SD

disruptioncoin

Bro one time I bought one of those hollow trick nickels off ebay and hid an SD card with information important to my business on it (it was my Tails boot drive). I chilled out for a year then decided to get back into business again, but couldn't for the life of me figure out where that nickel went.... I probably mixed it in with other change and bought a gas station coffee with it or something.

yesdaddy_____

Because I need to find the "protected" file in my internal or SD card storage. Which i can't access without SU

Different-Result-859

Yeah, got it. The card reader you need is one you can insert the SD card into it, and you can plug it into the USB slot of the computer. The SD card is usually more straightforward compared to accessing the Android. 3. Should be fine if write protection is enabled. 4. This is just software you can download with a Google search. It is actually easy. If you run into issues you can ask here. You can buy a $20 Claude Pro subscription to double check things since trusting somebody may not be always safe. 5. This is only if the data is corrupted and you can't read the SD card files.

yesdaddy_____

I haven't tried to read the SD card as of yet. I do have an SD card adapter (Larger card that the SD goes into) Neither do I know how to properly do steps 3-5 as you listed. I'm not a computer wizard. I don't know all the SDK & Platform tools correctly. I don't wanna accidentally delete or overwrite data

Different-Result-859

I just read that you are not even sure if it is the original SD card... But no harm trying. This is easiest to check IMO Let me just confirm the facts: 1. Do you know which parts of the HTC phone is dead? The screen? Battery? 2. Do you recall if the Bitcoin Wallet app that comes with this wallet is there even if the phone is dead or uninstalled? If it is installed, recovery is much easier. If it is uninstalled, it is very much harder. 3. You have checked your emails. Some versions of the Schlidbach wallet send you the backup by email. If you have not checked the emails that was in use in 2012, that can be the missing piece you need to unlock the wallet.

yesdaddy_____

Yeah, I read about basically every rooting method will wipe my data. It's been so long, I can't remember why the app isn't there anymore. But when I look through my other android devices. It shows all the transactions I've made. Like 900, 460, 760, 140 BTC etc. I'm thinking, maybe when switching phones in the past. (I don't recall the process) it would move the apps over to the newer phone. Unlike nowadays we have smart switch that basically moves everything to your new device. I'm almost positive it was running 2.3.4 I could try and check the SD for a back up file but it's been so long I'm not entirely sure that's the original SD card. Or if I even had an SD card in the phone in question to begin with.

Different-Result-859

No, that's risky. Buy an external USB SD card reader. That's safer.

eckstuhc

So a couple of things here.... Android 2.3.4 was the version that patched most of the known exploits (unrevoked 3, gingerbreak, etc.) If you are actually running that version, you are likely out of luck getting root. If you downgrade to Froyo it'll wipe your data, if you use the HTC bootloader-unlock, it'll wipe your data. I think "zergRush" works on some 2.3.4, but it's a long shot and not very likely. More importantly, was the app truly uninstalled or do you just not see it? (Settings > Applications > Manage Applications > "Bitcoin Wallet") If it's listed, the data is still there, but if the app was truly uninstalled, the wallet data is probably already gone. Uninstalling the app removes its private data directory, keys along with it. Your only recourse would be forensic recovery (NAND specialists). So... confirm if you are running 2.3.4 and if the app was truly deleted. Also, you said it has an SD card. Worth looking on that for a backup file if you haven't already.

Different-Result-859

You are using an external card reader to read the SD card with a computer, right? Are you saying that the computer is not detecting the SD card or not able to read the SD card? Have you done these too, to make sure the data is kept intact since even the act of connecting may make the computer do minor invisible edits? 1. Enable write-protection 2. Use external USB reader instead of built in laptop slots 3. Don't format or edit anything 4. Use OSForensics ImageMounter to create a raw sector-by-sector image file of the SD card 5. Scan the image, not the card if you can't find the file with data recovery software I think you are talking about accessing the internal data of the phone?

yesdaddy_____

I could try to use a card reader adapter (the one that fits an SD card into a larger card) on my laptop, would that suffice? I had a SD card port on my other PC but the power supply shot a fire ball into the sky. (The power supply blew up)

Different-Result-859

No doubt it is there in the internal storage. But it could be there in the SD card too, if you ever clicked backup wallet in the app. Since phone is dead, I think it is faster to check the SD card especially if you have a reader to plug it into PC

Different-Result-859

By checking. I have made some edits if you are checking SD card. Checking the device itself is harder.

yesdaddy_____

I've read that so many times on multiple forums. How do I know if its on the SD card or the phones internal storage?

Different-Result-859

Pretty sure I can help you. Read the SD card on your PC. Put it in a card reader and look for a file named like bitcoin-wallet-backup-2012-… (no extension), in the Download folder or the card's root. Once you have that, you can recover the wallet easily

TaxAdministrative447

I would grab a couple of the same HTC phones from eBay and use them as guinea pigs. Clone the SD card first and work from copies only. Then mess around with rooting/imaging on the donor phones until you have a process you're comfortable with before touching the original.

yesdaddy_____

Thanks for the advice. Yeah, alot of DM'S alredy. Anyway, The device in question is an: Android Incredible model number: ADR6300VW I belive the android version is 2.3.4 (the device is dead, I need to charge it to give further info. *side note: google stopped supporting this OS awhile ago. Which makes this harder to recover. The Schlidbach app is not on the phone. But i believe once I access super user I can access the protected files. (My other apps, wallpaper etc are still there, so no. It hasn't been factory reset or anything. It does have an SD card. To my knowledge and as far as I can recall, there was no PIN, password or anything about a backup. It would just prompt " The amount in your wallet is quite high for carrying in your pocket. Please move some to a safer place" As far as I've researched the phone NEEDS to be rooted to gain access to the protected files. But as you said, rooting the phone like whiching the OS the clock work recovery mod may or in most cases WILL delete all data.

eckstuhc

First, I highly recommend you refrain from any conversation via private messages or DMs. Keep things public, that way (hopefully) someone can call out if you are being scammed. Second, lets clarify: the funds do not "live" in the phone the way you think they do. That wallet in 2010-era was pre-HD, so you are correct there is no seed phrase, but the funds "live" as individual private keys. All funds are "on" the blockchain, your keys just enable you to sign for the corresponding public address (access the BTC). The good news - individual private keys are the easiest to import, those keys can be swept directly into Electrum without any other tooling. And you are also correct in that rooting does have the potential to factory reset your phone. Most rooting paths with /data which is where your keys exist. "Unrevoked" root uses an exploit in HTC-based devices that don't touch the data partition, but from what I know this is only HTC devices and pretty sketchy. I wouldn't go this route unless necessary. So ... questions: 1. What device make and model do you have? And how many? 2. Do you know what version of Android is running? (guessing 2.x given 2010-era) 3. Do they have SD cards or integrated storage? 4. Why can't you access the application itself? (phone doesnt boot, locked, app doesn't open, etc.) The truth: Depending on your make/model, I could help pintpoint a potential exploit-based, non-wiping root method, but it's a long shot. If you have access to the storage (SD card) you need to look for a file beginning with 'bitcoin-wallet-backup'. Historically these are saved to SD cards' /Download folder. Unfortunately, this is a manual backup that would've been completed prior, and prompts for a backup password when set (another hurdle if you do have one). Answer the above questions and I'll let you know what else can be done.

Either-State1365

I would also recommend learning to sign with microsd card/SD card, and learn to run your own node. If you don't run your own node, use multiple wallets and connect to different remote nodes to verify transactions.

bjman22

Interesting idea. I can think of one very useful function for such a feature. Say you want to be able to use the Q to type notes--eg. the combination to a safe where you have the SD card with the backup of your seed words stored or you even want to write in your note your passphrase for the seed phrase. Then you can export this note encrypted to a different SD card than the one where you stored your backup seed phrase. Now you have 2 SD cards which can be stored in different locations. If any emergency happens you can buy a new Coldcard and first put in the SD with the encrypted notes and read what your passphrase was and also the combination to a safe where you have your SD card with the seed phrase backup stored so you can open that. Then you put in your SD with the seed backup and your passphrase and you are back in business.

Fiach_Dubh

maybe i need to play with this more, but: iirc you have an encrypted note option ON device. you can also export notes I think, but i don't think they're encrypted while on the SD card? idea is to export notes from the device to the SD encrypted, so they can be reimported into the device to be decrypted. you now have a secure offline encryption decryption device sd card setup / analog protocol ?

r_a_d_

1. Because the hard part is properly handling your seed phrase, as I mentioned. 2. You still trust the device. You Always communicate via the qr code and SD card or whatever, otherwise you could never get the transaction information from the client, nor could you get the signed transaction to the block chain. So I would call them, different. Not better. The better approach would be to use both a cold card and a ledger with multisig. This way if either manufacturer tries some shit, you’re still protected.

mqfr98j4

Old phone, on the SD card, which has been gone for a good number of years

Far_Geologist_8049

Been using hardware wallets for a few years now and this is actually tough choice. Both are solid for long term storage but they have different philosophies. The Coldcard is more hardcore bitcoin-only approach - no USB connection to computer, everything through SD cards and QR codes. It's super secure but honestly bit more tedious for occasional transactions. You'll be dealing with PSBTs and need to get comfortable with that workflow. OneKey Classic feels more straightforward for someone who doesn't transact daily but still wants decent user experience when they do. The interface is cleaner and connecting to desktop software is less friction. Security is still very good, just not as paranoid-level as Coldcard. Since you mentioned ease of transactions is important and you're not daily user, I'd probably lean toward OneKey. The extra security layers on Coldcard are great if you're storing serious amounts, but for most people the convenience trade-off isn't worth it. Either way you're getting proper cold storage though.

WeGottaTalkAboutYT

https://docs.house.gov/meetings/JU/JU08/20250227/117951/HHRG-119-JU08-20250227-SD006-U6.pdf

Icy_Giraffe_21

It most definitely is air gaped. It never connects to your phone via Bluetooth or wifi, and you and utilize the micro SD card only to be even more secure

Street-Technology-93

Hawking a book using MIT SD

ChrisBattle2000

Also, it is amazing that he reaches such a doomster conclusion on BTC. His field is System Dynamics, a field which I have studied and worked in for over 20 years. Saylor makes amazing economic arguments using SD concepts and is responsible for a lot of the finance sector's pivot to BTC, so how come Keen can not see the value proposition? That is what I find inexplicable

ZedZeroth

They just mean store the seedphrase as a text file on the SD card and then encrypt it.

andzno1

>Imagine hauling metal plates through an airport if you can just encrypt a micro SDcard the size of a fingernail. 😂 How do you even engrave a seed phrase on a micro SD card?

rs1971

I don't know how long you've been in BTC, but the first hardware wallet wasn't even released until 2014. Early BTC forums / message boards were basically inundated with 'Help, my computer crashed and lost my keys!' or 'Help, I copied my keys to a SD card but I've lost it', etc, etc, etc. No one cared enough to take proper precautions (and it wasn't even clear how to do proper precautions safely) when the stuff was worth $4 a coin.

AcostaJA

Most hardware wallet work with desktop clients, some hardware wallet support PBST signing on SD cards which only need a desktop or mobile client while generating the transaction or broadcasting it (actually a fully signed psbt maybe broadcast by cut n paste at some block explorer/miner pools). A Bitcoin transaction needs to be broadcast, otherwise will never be mined (like having a signed check and never showing it at your bank)

NOLAgambit

I never said that he scripts part of his videos for entertainment therefore he’s going to set up a ponzi scheme. I straight up am saying he has committed fraud and therefore should never own a bank. Charles Ponzi is similar in that sense, but Charles Ponzi was GENUINELY A BETTER PERSON than Jimmy Donaldson, AKA MrBeast. Want me to make it easier for you? Here ya go: Charles Ponzi: Kind as fuck, but also didn’t understand finance as much as he understood how to commit fraud through leverage. WILLING TO ADMIT HE IS A GARBAGE PERSON. After all his bullshit, people were still willing to give him money to invest and ultimately screw them over. MrBeast: Sexual harassment, gambling fraud, rigged lotteries, rigged games, FAR TOO SOCIOPATHIC TO ADMIT WRONGDOINGS EVER. MrBeast is a worse and more modern Charles Ponzi. I think they’re both a great litmus test for finding out what idiots will trust a person blindly without verifying if they’re actually full of shit. Now if you’ll excuse me, I have to go back to Rockport to grab the last load of free golf carts to sell for a quick buck. There’s too many golf cart companies and it’s stupid easy money to transport them to South Dakota to sell at 5k apiece, there’s already a ton of buyers out there too, but I don’t have the equipment to travel there by next month, so I’m gonna sell them for pennies on the dollar. If anyone wants to DM me, I’ll sell you my golf carts for $300 apiece. I picked up about 200 carts for free for myself because I’m just charming and lucky and I work hard and wanted to start a golf cart business to match my other tour business. If you want some, you can DM me and I’ll send you the invoice. Even though I can’t transport to SD, I can TOTALLY transport to you anywhere in the country. And if you can trust MrBeast, you can also trust me. :) Anyway, back to sellin’ carts.

almbfsek

it's crazy people are using SD cards for important data. literally the least reliable storage media.

Enrrabador

You had your private keys in a SD card, you snapshot your private keys… honestly, I’m more surprised you still have bitcoin than you finding the private keys for it…

BlacksmithPlane3988

Fair point, let’s do the math and see if it’s irrelevant. Let’s assume you hold for T = 6 years. Volatility is not some kind of ‘daily noise’. Volatility (v) here is defined as the standard deviation (SD) of annual returns. Let’s assume 70% Total volatility scales with square root of at. v_6y ≈ SD * 6y ^ 1/2 ≈ 171% That means the standard deviation of you cumulative returns over 6 years is ~170%. Does your volatility grow slower than your expected returns? Yes. Are 170% range still huge? Also Yes. But sure, let’s say that you’re be on the good side of fortuna and come out on the positive side. You are basically betting that nothing in your situation changes over 6 years. No unemployment, no health emergency, no other needs of liquidity such as family emergency. I am not saying that this is not a viable strategy, all I’m saying is that you should assess risks realistically. Not through a ‘I am in my early 20s and invincible’ lens. I do wish you all the best however and hope that it all works out!

Sos418_tw

so [crypto.com](http://crypto.com) just got conditional OCC approval for a national trust bank charter. for anyone wondering how this stacks up against the big custody players: Coinbase Custody - already has state trust licenses plus SEC registered broker-dealer status. handles like 100B+ in assets but fees aren't public Gemini - got NY trust charter back in 2015, pretty much the OG regulated custodian. solid insurance coverage but limited to fewer assets BitGo - went the state-by-state route with SD trust charter. does wrapped tokens which others don't really touch the main diff here is crypto.com's going federal instead of state level. means they won't need to juggle 50+ different licenses and can theoretically operate nationwide faster. still conditional tho so they gotta prove capital requirements and compliance infrastructure to OCC first for institutions this probably matters more for cost structure and interstate operations than actual security since all these are pretty locked down. anyone got intel on their fee comparison or insurance limits

Either_Phase_7951

Going through all this effort while you can put your seed on a micro SD card as tiny as a nail or a tiny paper folded up put under your inner sole of your shoe, these are things I came up with instantly, there are so many other possibilities if you think out of the box.

SecureWriting8589

This would absolutely make sense -- if crypt was normally distributed, but it's not. Instead crypto values are skewed, are volatile with volatility clustering, and are subject to phase shifts with non-stationary mean and variance. For example, a 3-SD move in a normal distribution should be a 0.3% event, but this happens with crypt **multiple times per year**. In short, you are grossly over-simplifying things to the point that your math doesn't math, as you're confusing *descriptive* statistics with *predictive* statistics.

AutoModerator

Post is by: More_Ad3831 and the url/text [ ](https://goo.gl/GP6ppk)is: /r/CryptoMarkets/comments/1r505ka/probabilistic_value/ The Normal Distribution is a statistical model where data clusters around a central average the **mean**, and extreme outcomes become increasingly rare as you move away from that center. Currently **BTC seats above 1,5 z score**. A Z-score tells you **how many Standard Deviations** a price is away from its average the Mean. That score is the actual value of price and the actual probability for price to drop on **3 SD is 6%**. For BTC to just return to the mean price the **probability is 43%** and to say that BTC is on low value (-1,5sd) **There is a 83% probability to see that in the future.** This post is for those who shorting. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/CryptoMarkets) if you have any questions or concerns.*

Budget-Dress-7942

I’m not going to do it, but which would be the safest hardware to use this on? DS uses SD cards and those are relatively volatile aren’t they? So what would be the safest option?

More_Ad3831

This SD was from a Short Term Holders MVRV indicators but i couldn't upload image

OkBuy4754

\-1.5 SD bottoms have reverted 82% historically within 14 days. Scale in with 0.25% per entry, trail stops at VWAP.

AutoModerator

Post is by: More_Ad3831 and the url/text [ ](https://goo.gl/GP6ppk)is: /r/CryptoMarkets/comments/1qxuobk/short_term_moving_into_stocks/ Retails lost everything, Media are full of short posting, news are short posting, friends saying its going to 0, but **Data proves deferent** **BTC is now -1.5 SD** away from the mean this is the forth time BTC hits that low and you think that's not the bottom? *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/CryptoMarkets) if you have any questions or concerns.*

Hot_Philosopher3199

I live in the US. I moved my IRA to a SD IRA, bought BTC, moved it to cold storage, then sat on it for years. This year I reversed the process back to a traditional IRA. Not tax.

NiagaraBTC

ColdCard MK4 is a less expensive option to the Q. Less expensive than Jade Plus also I think. Use it air gapped with NFC or SD card.

SteveW928

As an aside, there are a few details around seed derivation path that might vary slightly from wallet to wallet, but this is becoming more a thing of the past. For the most part, yes, you can restore a Bitcoin seed phrase to about any Bitcoin wallet (hot or cold, hardware or software). That said, it is a good idea to actually test your setup. This not only helps you become familiar, but increases your confidence in your setup. Create a wallet with your hardware wallet. Get your seed phrase down and backed up. Move a smaller amount of Bitcoin to that wallet. Then, delete the wallet... like do a factory reset on your hardware wallet. Try restoring that seed phrase to the hardware wallet (and remember, NEVER enter that seed phrase into any phone or computer in any way, or you've undone the whole point of a hardware wallet... only into a hardware wallet!). Once you've done this, you'll see the hardware wallet more as a tool, even if you decide to store your seed phrase there for convenience. Keep in mind, most hardware wallets also let you operate them in a mode where they erase when turned off. This is usually called something like stateless mode. This is how I use my wallets... essentially only signing devices. I also don't plug/connect them into my computer (USB/Bluetooth), as I use the camera or card reader for what is called 'air-gapped' use. This is an extra security step many hardware wallets support. The only time I connect it to a computer is firmware update, but then I do a factory reset after. Some, you can even use the SD card to do firmware updates, so you never connect to a computer.

paulzag

Everything has risk, the goal is to reduce the opportunities for compromise. If you are *not* a well-known BTC HODLer: Download APK & check signature. Boot from a newly prepared Linux live usb Check APK signature still matches under Linux Obtain clean/new SD card Move APK to SD card SD card into Android phone Install APK. Well-known BTC HODLers know what to do as they can’t trust anything.

Navin__R__Johnson

Metals on Ebay is completely fine, jist no private sellers. So long as you order thru dealers, its GTG. Eg; APMEX, SD BULLION, BGASC, ETC...

Yukon_Wally

It's only if you get caught. Plus, you don't need a hardware wallet for cold storage. An offline wallet on an SD card/USB drive works just as good, and if I'm not mistaken, you can back the seed up to a hardware wallet if/when you escape that dystopia. 

SodOffChoom

My friend, the best wallets according to me: 1) Tails Live Persistence with Electrum on it totally offline. Copy down your address/QR in txt file and put it on another flash drive to receive bitcoin. For sending you can sign transactions offline too. Link to guide: [https://youtu.be/XQ5EjApvlEQ?si=E4SeErukigs2yMsw](https://youtu.be/XQ5EjApvlEQ?si=E4SeErukigs2yMsw) 2) Make a Seedsigner: Airgapped - DIY bitcoin wallet all under $50 no matter the country. All you need is a Raspberry Pi zero, an SD card, an Camera and a small display. Link to guide: [https://youtu.be/x0Ee35Ct0r4?si=r7RCAWRsWSYdY\_0X](https://youtu.be/x0Ee35Ct0r4?si=r7RCAWRsWSYdY_0X) 3) Get a Trezor Safe 3 which is cheapest Trezor. I myself am considering purchasing two Trezor Safe 3 instead of Just one safe 5 as a backup device. 4) ColdCard is the final boss of bitcoin wallet. Like the best that can exist for bitcoin only. ADVICE: Please ignore any Closed Source wallet company like Ledger or any Chinese wallet company like Safepal, Keystone or even Tangem because they aren't really the best of the wallet you can have. Stack Sats!

Elemental_Breakdown

Many of the bullion dealers offer discounts if you pay in bitcoin. SD Bullion for example an ounce of pure silver is about $10 cheaper if you pay with btc.

lowercaseCapitalist

Basically, what the SD was to the Gestapo.

SteveW928

The Ledger hardware might be OK. I'm not aware of it ever being hacked. But, the company, practices, and software are, IMO, quite problematic. Why would anyone purposely subject themselves to that (unless they already own one)? There are much better options, like Coldcard, Blockstream Jade, Seed Signer, Trezor (Bitcoin only!), etc. (I'm guessing you're considering a Ledger because of 'crypto'? Not sure I can disuade you from that course, but I strongly recommend using a Bitcoin-only wallet for Bitcoin... the rest is garbage that opens attack surfaces.) I also like using a hardware wallet in air-gapped functionality (ie: QR code or SD card, vs USB/Bluetooth), and even as a 'stateless' device (ie: private key not stored on the device... erases when you turn it off... it becomes just a signing tool). I think this forces one to think properly of a hardware wallet as simply a tool, and not storage-device. And, then it comes down to features... as they all become interchangeable. It forces you into a proper setup and thinking through your seed-phrase backup and security.

SteveW928

Well, first I applaud you for recognizing the risks in both and not rushing in. The 'not your keys, not your coins' I often fear might push people in over their heads. While keeping on an exchange has risk, so does an hasty (w/o enough learning) or improper setup for self-custody. I'd say that for what I'm aware of right now, and ETF would be the only option. That probably isn't a horrible option for some Store of Value benefits of Bitcoin, but you lose some of the other aspects of Bitcoin. So, it depends on what is important to you. (ex: permission-less send receive, country-fleeing, etc.) I don't fully understand how ETFs work, but I'd assume some risk there as well. But, what I'll now say, is that self-custody doesn't have to be super difficult. It might take you a bit of time think through the details, learn some things, and then implement and monitor/protect. Only you know your limits and circumstances. But, I think most people can do it with a bit of effort. Here is what I recommend as a base setup; First, just create a hot-wallet (or a couple) on your smartphone. Write down the seed phrase. Move a little Bitcoin to one of those wallets. Practice deleting/restoring (yes, this means you'll be entering your seed phrase on a digital on-line device to restore it... which is generally a no-no, but this is a small amount and we're doing it for easy-learning purposes). Maybe send some to a 2nd wallet you create. The idea here is to get comfortable with how this stuff works before making your setup for bigger amounts. Then, get a hardware wallet. Most Bitcoiners like Coldcard (several models), Blockstream Jade, Trezor (Bitcoin only version), Seed Signer (and a few others). I recommend ordering it directly from the company, not buying at Amazon or in stores (reduce supply-chain risk). IMO, the best setup for most people, is to use the hardware wallet in an air-gapped way, which means using and SD card or QR code to sign transactions, rather than plugging it into USB or using Bluetooth. Create a seed phrase with the hardware wallet... write this down... back it up into metal (many methods... I like stamping into steel washers, as the stamps, parts, jigs are easy to get and you can make as many as you like cheaply). Maybe create another copy and think of a 2nd location to store it. (continued ...)

forestwinds26

Also you can use a dedicated offline device for encryption that way your keys are never exposed For example an old PC with no WiFi or Bluetooth chips running fedora with full disk encryption used to encrypt the files before moving them to an online PC using QR codes or one time use SD card/USB sticks that are destroyed after The only problem i see is that if I know your using this I could kidnap you and wait 30 days for the money Nice write up thanks

word-dragon

I like the Keystone 3 Pro with the bitcoin - only firmware. It ticks all the boxes for me - open source, air gapped, can load firmware via micro SD card. Most importantly for me, it can handle three separate seeds in one device. I use it with BlueWallet, but it works with many wallets.

SickleFoot

For now, I'll format the SD card, reflash and retest and report back!

SickleFoot

Yeah, it does. But the SD card is brand new.

Crappyhodler

if OS runs on SD card, maybe it's the card failing

Dukaduke22

I'd go with the cold card Q. Specifically you could buy a Coldcard Q on Black Friday for a deal: \- I just can't justify buying a product that supports 'all the coins and all the Dapps.'... there are scam coins hurting people and I don't want to be apart of them... I know they have BTC only firmware though. \- I don't see that it does QR code transactions... I have cold card Q and can confirm the BBQr setup is basically perfect. \- I like the full keyboard and replaceable batteries in the Q. Just makes more sense in my brain. \- I like the simple screen rather than the fancy color screen on the Trezor. It's just one more attack service having to use firmware that runs that color screen. \- I don't see an SD Card reader on the Safe 7. I personally love backing up encrypted seed onto an industrial SD card and/or encrypted passphrase onto an industrial SD card as an alternative backup option. Super cheap alternative backup. But also won't lie one of the best deals for any hardware wallet is the Bitkey. The main downsides of the bitkey is privacy cause you have to use their app from the App Store and you can't verify signature of the software from an app store. And no screen to verify your receive address from the hardware wallet. But besides those two points you have insanely good 2 of 3 geo distributed multi sig for $100. No dinking around with steel plates or descriptor files or two hardware wallets or finding at least two offsite secure locations, etc. You can't get better defense against a $5 wrench attack any cheaper and easier to setup. I'd say $5 wrench attack and shooting yourself in the foot with incorrect setup are the biggest attack vectors right now for most people and bitkey fixes both of those almost perfectly....

riscten

Probably. There's a version of Ubuntu for RPi, but idk if it has the live session functionality. If it doesn't there's probably some other distro that can do this. Or just install Ubuntu on the SD card and destroy it afterwards. [https://ubuntu.com/download/raspberry-pi](https://ubuntu.com/download/raspberry-pi)

Your_As_Stupid_As_Me

99.99% of these coins are not.... Very very very very very few handful actually have a SD card in the center mass with old-school wallet information to claim a Bitcoin, but it's highly unlikely that the coin you have is one of them.

riscten

Have you audited the firmware running on your printer? Even if the firmware was innocuous, that you spun up an airgapped PC to generate the model, sliced it and copied the gcode to an SD card, printed, then reflashed your printer for good measure, how is that a better process than writing the words on a piece of paper? It's a lot more work for what? PA12-CF will start softening at 108°C. For comparison, paper starts yellowing at 150°C and won't darken or become brittle before 200°C. Pen ink starts degrading around 150°C too. If you had both a paper wallet and a plastic wallet in the middle of a housefire, both would be lost, but if they are in a nearby room that isn't engulfed in flames, the paper would actually last longer. And if you're worried about water, just pass the paper wallet in a laminator, that way you get the benefits of both paper and plastic. Not that either is great for storing mnemonics. The right solution is stamped stainless steel, titanium or even copper. You don't need any specialized equipment for this. Plenty of ways to encode a mnemonic with a hammer and basic punch or even a screwdriver. You don't need fancy letter punches and pre-engraved plates.

PhiNeurOZOMu68

DO NOT 3D PRINT YOUR SEED PHRASE. Most users have Bambu Labs and it is sent over a server and stored on SD card this is the most insecure way to store your seed I've ever seen other than on a billboard in Chicago

SherbetFluffy1867

What do you mean "remote"? You can use physically connected (USB cable, Bluetooth), air-gapped (SD card or QR scan), NFC or software key (hot) signing devices with Sparrow. Probably best you watch some videos. BTC Sessions has some great Sparrow tutorials.

PaleInTexas

>I can assure I’m not getting a thing from any blue state. If you live in a red state there is a good chance its being propped up by money from blue states. That's just how it works. HHRG-119-JU13-20250715-SD014-U14.pdf https://share.google/KZV5xbj7kgHIgR50T

Positive-Theory_

That's part of what makes it so secure. Very few people would ever recognize what it is unless you told them. But it's also something that's hack proof, EMP proof and will never become obsolete, there's no passwords to forget,it doesn't erase itself like hardware wallets do. Once you know how it works it's a very easy wallet to use, very easy to conceal. Especially with modern micro SD cards you could hide the keys to an enormous fortune almost anywhere.

TurdsBurglar

Ya Costco or online JM bullion or SD bullion are legit

RetiredAvocado

Ripped at the seam where it normally can rip?Or a hole in the side like someone did it? The seam may have torn in shipping and handling. The bag isn't the strongest security feature anyway. It's all in the firmware and secure elements. Update the firmware from micro SD. See if the green light is on. Create wallet note addresses. Delete it. Recover it from backup and compare addresses. They should be the same. Wipe it, create new wallet. Addresses of new wallet should be different from previous setup. Delete it, restore it from backup, compare addresses again. Should be the same. Load it with some small amount and let it sit. Coin swiping is automated nowadays. If it disappears it should disappear quick. Or try to get a replacement though customer service with photos. No phone calls.

SherbetFluffy1867

The thread was about the Jade. Jades are Bitcoin only. Not sure where Ledger came into the conversation. If you are working with a Bitcoin only device, using the term "crypto" is obnoxious. Whatever. You can use any hardware signing device to generate unlimited numbers of private keys. Those private keys are derived from generated mnuemonic seed phrases. Whether you use dice or coins or online computer programs or hardware signing devices, same same. You can generate your words via dice and then enter them into a Ledger. You can generate them via coin flips and then enter them into a Trezor. You can use a web tool and then enter them into Sparrow wallet. It's all the same. Some wallets, like Jade and Cold Card, have the ability to sign transactions air-gapped. They use either QR codes or PSBT's transferred back and forth via SD card. The Jade Plus can do both. When it comes to "temporary signing" or "stateless signer" you are talking about using a hardware signing device in such a way that the private key does not stay on the device at all times. Each hardware wallet deals with private key safety in a different way. Most use a secure element chip, like credit cards do. The keys stay on the secure element at all times and you gain access to function via a PIN or password etc. Jades are unique in that they don't have a secure element. Blockstream has what is called a Blind Oracle that functions as a way to protect your private keys without a secure element but that requires authenticating back to Blockstream when you unlock your Jade (assuming you are not using it as a temporary signer). Blind Oracle requires physical connection via USB cable or Bluetooth. This by definition makes the Jade in those modes not air-gapped. To use the Jade, or any other air-gap capable signing device, as a temporary signer means to literally wipe the device after every use. Nothing more secure than a device that doesn't even hold any private keys. Each time you want to use the device, you must restore your private keys to it. You can manually restore via your seed words or you can speed the process along by scanning a QR code of your seed words. Either way, once restored you can use the device to sign transactions. When you shut the device off, it wipes itself. Rinse and repeat. When I recommended you go watch tutorials I was referring to Jade specific tutorials. I feel like you would have a better understanding of how the Jade works specifically since that was the scope of the original post. On the reference to the last word be generated by the Jade. The last word of any seed mnuemonic is always a checksum. Most people don't realize that you can't just smash together BIP39 words at random to produce a valid seed. There is more structure involved in the creation of the seed and the final word is always a checksum. That is not specific to the Jade.

Av8erphoto

His name will be saved on a SD drive and fly around the moon. Literally to the moon

JoMaster68

it is the real number, assuming a system was used with a standard deviation of 15. here is the math, explained by chatgpt. Mean IQ = 100 Standard deviation = 15 Step 1: Convert IQ 276 to a z-score z = (276 - 100) / 15 z = 176 / 15 z ≈ 11.73 Step 2: Find the probability of being 11.73 SD above the mean P(Z > 11.73) ≈ 4.3 × 10^-32 Step 3: Convert that into "1 in X people" 1 / (4.3 × 10^-32) ≈ 2.3 × 10^31 That means: ≈ 1 in 23,000,000,000,000,000,000,000,000,000,000 people Earth’s population is ~8 × 10^9, so expected number of people with IQ ≥ 276 on Earth is basically 0.

ProprietaryIsSpyware

I use a SanDisk extreme pro, but I use it for my camera as well, any SD card will do, don't spend the extra money for the extreme pro if you don't actually use it for it's intended purpose.

zeeshiscanning

the only thing that you should consider doing with an SD card is to use it for firmware update for your cold wallet, not to store your seed phrase

riscten

The best SD card is no SD card. Use an airgapped wallet that signs using QR codes.

Vorrion87

Stader (SD)

Live-Tap2576

Yes, flash your drive with UmbrelOS and boot from there. Don’t boot from the SD card given in the kit. You’ll boot Linux instead (ask me how I know 😂)

proXtu

True, i was wrong, no SD card. I use it with usb-c cable and sparrow on a clean laptop.

bremstol

No SD card I think, but it is possible to use bluetooth. There is also a solution using the camera on the Jade and QR codes, haven't learned that yet

proXtu

Yeap. It is safer to format it, install a clean SO and use an independent wallet like Sparrow. Also, I think you can use Jade without connecting it to the computer, by using an SD card?

stranix13

The only thing i have that makes me think we couldve hit the top already is the timing matching up with expected cycle timing based on my linear regression on various times (top to top, halving to top etc), however there is still some uncertainty in the timing and the 1SD is like 30 days, we still have till at the very least mid October or November to hit a new ath. As well almost every other indicator has not shown close to cycle top metrics

dunnfather

Does this device really not have an SD card slot? 128GB without option for more and no slot is a huge miss if so, can’t find an answer

Important-Ad1500

Trezor is fine. I prefer cold wallet options that arent relying on usb to send transactions. Look for QR or SD card options.

ElderMight

To generate an address, you don't actually need to plug your hardware wallet into anything. The hardware wallet protects the private key and signs transactions. You use a software wallet to interact with the hardware wallet. The software can receive an xpub file from the hardware wallet to generate receiving addresses. Some hardware wallets are air gapped, meaning it does not need to connect to a computer at all. For example, to sign a transaction, you might partially sign a transaction with your software wallet and save it to an SD card. Insert the SD card into your hardware wallet and sign it with private key. Place SD card back to your computer and broadcast your fully signed transaction. Same can be done with QR codes if your hardware has a camera. No connection direct connection needed which can be more secure. But to directly answer your question, after you buy on exchange, you can generate an address with your software wallet and the money will go into your wallet. You may want to occasionally verify the address actually belongs to your wallet with the hardware device. The hardware device is the source of truth. Software wallets can be corrupted or compromised.

kjthemick

Raspberry pi 4 / 8gb ram + case = $140 Cheap 2TB SSD = $80 64gb Micro SD = $14

Forreta_Ambicioso

Ok your case is a classic one, you dont saved on Google Drive the 12 seed phrase words but the master key public, congrats you dont saved the private key on the Google Drive exactly because the hacks and etc. like screenshots and whatever, i have some questions here and starting this conversation i gonna say don't accept the finish of it... this is not over yet... i have some questions: 1 - from 2012, how many and exactly Bitcoins you are talking about? 2 - that hdd still exist? 3 - if still exist, you formatted it or uninstall the Bitcore ( Bit Q ) only? 4 - independent the answers for my 3 question, you already tried to recover files of that hdd, like Recuva or other softwares!? 5 - go deep in the search of the . txt file, go check all your USB pendrives; all your SD cards; all your electronic devices who have Rom memory; go check your email again and clouds, search by specific key words, i say that because we cannot remember everything, sometimes we do alot of backups of the same thing and we just dont remember how many or where, life goes on and we just forget... think if you wrote it either to somewhere... only you can answer it! 6 - you used the public master key on electrum of course this will be a watch-only wallet, like i said you need the private key or the seed phrase, you can use and test all the different wallets you want, this will be a watch-only wallet always. 7 - when i asked what i ask in the 3 question is because some people uninstall the Bitcore but the bitcoin paste (where is the wallets and other infos), stay there in the majority of the cases... c:/ - users - YOU - appdata - bitcoin - wallet... But because you switch to electrum isn't your case, but you can check it anyways maybe you have some other Bitcoins or a fraction of it from that old times, just check it either... 8 - final and sorry for the long text lol, i dont understand one thing, you said you had much more Bitcoins than what you saw on electrum, that's strange, we have 2 options here: or you confused or someone stolen part of it... but if someone stolen part of it, why not to stolen all of it??? For it, please go to the Blockchain explorer (google it), and check all your addressees from electrum, one by one, go see the transactions and tell me if you see something wasn't you... 9 - read all of it with attention please, answer me what i ask if you want, if you need more help after it, just dm me ty and good night, good luck 🤞!

Satoshi-Boy95

**Open Source?** * Goal: **Yes, progressively**. I will open up the *client code + protocol spec* after independent **security audits**. * The core out-of-band relay logic will stay closed at first (IP protection), but **NDA access** will be available for reviewers. Priority is security first, then disclosure. **“Offline balance check – I don’t see the advantage.”** * The point is not to “guess the balance without network.” The idea is that the **phone itself remains offline**, while an **out-of-band relay** fetches blockchain data and returns only the **minimal metadata** (balance/confirmations) to the user. * Useful in **zero-connectivity scenarios** (blackouts, remote regions, border crossings, crisis zones): the user can still **see their balance and send transactions** without ever turning on data. **“Offline signing already exists with Coldcard, etc.”** True — *offline signing* exists. The difference with Bitsend is that it’s **end-to-end**: * **No QR codes, no NFC, no Bluetooth, no SD cards, no second online device needed.** * A transaction is **signed offline** and then **instantly broadcast worldwide** through an alternative relay — so the user never needs internet access at all. * It’s not just “signing.” It’s **offline signing + instant broadcast** without the device ever going online. You can see the result on the blockchain in real time. **Security** * **Keys/seed never leave the device.** * The relay has **no access** to private keys. * Independent **audits** will precede wider release. The demo runs on **testnet** and shows exactly this: **offline register → offline balance → offline send → instant on-chain broadcast.**

Primary_Nobody_2913

13BVb8SD6rgaWivTZfbrdZzMcpASgEgLn1

ReadersAreRedditors

Use a raspberry pi with full disk encryption, I don't trust those hardware wallets. Copy the encrypted SD Card to multiple SD Card's for safe backup.

attic0218

The SD card backup is generated with BitBot02. It has a SD card slot

ElderMight

Do NOT put your seed phrase on an SD card. The seed phrase should remain strictly offline and never touch an internet connected device. Putting it on the card requires typing the words into a program on a computer, which opens up attack vectors you haven't even considered. Doesn't matter if the computer is online or not. For a blockchain explorer, you can use mempool which comes with a front end and back end in a docker container. Really easy to set up.

rupsdb

Which Debian build did you install on the Raspberry Pi 4 — the unofficial one from raspi.debian.net, or the official ARM64 build from Debian? From what I’ve gathered, if you go with the official Debian ARM64 image, you’ll need to install UEFI on the SD card first. That UEFI firmware then detects GRUB and boots into Debian. However, this approach can lead to issues with USB boot support. You mentioned better and cheaper hardware is available - so which hardware do you recommend?

mnkbstard

not a requirement. but advised. any transaction, signature or generic communication (master public key pairing with watch only wallet for example) between airgapped device and connected system can be verified, decoding QR code or raw SD card data. this is not possible using USB connection. USB connection might also be affected by unknown exploits. also, if device firmware and application software is not opensourced, user has no idea if the device is capable of leaking full seed or private keys. this is absolutely not possible using airgapped devices and verifying the content of airgapped data transfers.

ElderMight

Air gapped hardware wallets don't need to connect to a computer or phone. You pair it with a software wallet. In the software wallet, you partially sign a transaction, export it to the hardware device either with micro SD card or using QR codes. Then you sign it in the hardware device and send back to your software wallet to broadcast the transaction. It is impossible for a remote actor to steal your money because transactions must be signed by the hardware device.

agaunaut

For anyone dealing with ColdCard: If you need a watch wallet you can export a wallet from the device onto an SD card that you then import into Sparrow.

siasl_kopika

>However I'm not sure if that's any better. still closed source so not really any better. The security game is linux or losses. > .still no to the passphrase? Generally speaking, the passphrase as used by most people makes the system wildly less secure. And when used properly by an opsec expert, makes it only slightly less secure only due to being more complex. The bonus word cannot improve anything. They are only good for make-believe situations that can never happen. > May I ask how you store your crypto? If you have only small amounts to secure, all you need is electrum on a linux. That will be 99.9% of what anyone would ever need, and donig more is overkill for most people. Coinbase published a guide called the "glacier protocol" which i think is a half decent starters guide if you have very large amounts. It has a few flaws, such as using USB drives instead of using SD cards, but its a decent overall description. >.should I just buy into an ETF? not your keys not your coins >grift is the name of the game in 2025. Not at all, not with bitcoin at least. What we are seeing is an awakening to personal security. For over 40 years, people have accepted insecure personal computing practices, purely idiotic password policy, social media violations of their privacy, and many other opsec failings are normal and acceptable. In reality, the concept of your computer catching a virus should sound as silly as your car catching cold. Closed source software should be laughed out of the room. Windows OS should have never existed. Security is honestly easy to do right. We just dont have a culture of people doing what is right, so the average person has no privacy and no opsec. And the average person thinks doing things right is too hard, even when its really not. And that will cause pain until it changes.

_pm_me_a_happy_thing

2. The only way for that to happen would be IRL. And let's say if someone did manage to login to my Linux laptop: I use TailsOS, so everything is erased on shutdown, nothing is stored. Even if they managed to catch my laptop while it's turned on and I was in the middle of using Sparrow. They only have access to my public key. Even if they managed to catch my laptop, turned on, with SD card in. They only have access to my public key, the signed/unsigned TX cannot be tampered with. The RPi device is also stateless and 100% air-gapped, if they get to that, nothing is stored. 3. 1 slot 4. Yes, it's in the dev. notes, on the GitHub, and I've used it myself. Everything is stored in RAM, and it's gone when power is off 6. Check the GitHub, you can see the (public) contributers and code there. It's open source. The email on their website is for donations and community outreach.

LSeww

\>The SeedSigner is purely a signing device, it is not a wallet. 1. The wallet is essentially a set of private keys. Private keys are needed to sign transactions. It's the same thing. 2. The most important attack vector is when someone gets to your device. What then? How strong is your password? 3. You have 2 SD slots on RP? 4. In theory maybe, but has anyone tested it? 6. The code is signed by an anonymous account "seedsigner <btc.hardware.solutions@gmail.com>", if that's not sus for you then well I guess you're just built different. There are a lot of other well established open source solutions.

_pm_me_a_happy_thing

I understand your concerns, but I have a few things to mention: 1. The SeedSigner is purely a signing device, it is not a wallet. 2. The open source OS is a specialised version of the Buildroot Linux OS, it's very barebones, this is to keep it lightweight and reduce any possibility of attack surfaces. 3. Only two things touch the SD card: transaction files, public key for watch-only. Private keys and seed phrase stay purely offline. 4. The signing device is stateless, when powered off it does not retain any memory. 5. The hardware itself has no WiFi, radio, Bluetooth modules - and comes from a reputable UK based company. 6. Everything used in the setup is open source, Sparrow (wallet), SeedSigner (air gapped signing device). If you're more security inclined, have Sparrow be on a Linux Laptop running on TailsOS, running your own bitcoin node, and link it to Sparrow via TOR, and only ever use that device for BTC. I much prefer this open source setup than trust a commercialised company.

LSeww

Look, I'm just saying that this whole thing doesn't project any confidence. Not to mention that you don't need any special distros to do what you're doing, i.e. just transferring files via an SD card. What you should consider is how well the data is encrypted, given that you're exposing the contents of the sd card to an online system, and whether the software leaves any traces in the sd card memory.