The process of copying one or more files to an alternate location for safekeeping. Typically refers to the copying of Bitcoin's wallet.dat file but may also refer to the built-in JSON API command to perform such a backup.

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Wallet loses the money to be restored in bitcoinj

I have a problem when using the library bitcoinj. When I restore a wallet from a backup, if it has received money in some of his addresses to synchronize with the blockchain, the money does not appear....
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3answers
141 views

Is it important to have an unencrypted backup of the private key?

Am I correct that in not having our private keys written in paper or otherwise backed up we are implicitly trusting the wallet developers to keep publishing wallet versions that are capable of reading ...
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111 views

How do I import my wallet.dat file into a new wallet? [closed]

I have my wallet.dat backup file, but Bitcoin Core isn't able to verify it. How do I retrieve my backup?
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1answer
198 views

Are multibit HD (or other no web wallet) and Blockchain.info wallet words compatible?

Well the title says it. I tried to enter blockchain.info seed words into multibit, but it doesn't seem to be working. So what I'm trying to do is to have multibit (or other) alternative of my ...
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1answer
115 views

Is the mnemonic passphrase enough to backup with deterministic wallets?

I'm using a greenaddress.it wallet, but assume this will be the same for all deterministic wallets. (If not, please correct me!) Since the first and all further bitcoin addresses my wallet will ever ...
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1answer
56 views

What if I backup my wallet from a client that is not fully synced with the blockchain?

I've just backed up an encrypted wallet, but the client (Bitcoin-Qt) is 26 weeks behind. During these last 26 weeks this wallet has only received BTC (roughly one transaction per day), no payments ...
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1answer
72 views

Why does my wallet size increase over time?

Why does the size of the output of      bitcoin-clibackupwallet or, equivalently, wallet.dat increase over time?
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2answers
444 views

Estate planning: how can I ensure my bitcoins are inheritable?

What are good ways to ensure my bitcoins can be inherited by my family when I die or become permanently incapacitated? I think there are probably two significantly different situations to account for,...
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71 views

bitcoin-qt restored wallet.dat all synced closes after correct passphrase “assertion error crypt” HELP

Installed bitcoin-qt and replaced new wallet.dat with old wallet.dat backup Opened bitcoin-qt and let it sync and all blocks synced and wallet has correct funds and past transactions. I Want to ...
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1answer
39 views

Can I ignore the blocks directory for time machine backups on OSX?

After installing Bitcoin-QT I have over 40GB of files in the ~/Library/Application Support/Bitcoin. It seems that the most important file there is wallet.dat. Does it mean that I can exclude from time ...
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1answer
840 views

Import two wallet.dat into Bitcoin-Qt client

This is very closely related to Import wallet.dat into a new Bitcoin-Qt client, but I feel this is not a duplicate because the (great) answer to that Q is for only restoring one wallet. I used ...
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2answers
3k views

Blockchain.info - Forgot My Secondary Password. How to recover it?

I haven't accessed my blockchain.info account and I completely forgot my secondary password in order to send out bitcoins. I still have my mnemonic, but that's totally useless and MISLEADING as it ...
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1answer
162 views

Multibit Private Key Restore

I backed up my private key and restored it into a new copy of Multibit (difference machine). The import was successful but the public key address has not been updated with my previous address. I've ...
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1answer
68 views

Is mainline Bitcoin planning on switching to deterministic wallets?

Deterministic wallets enable reliable backups but the mainline client doesn't use them. I was told that bitcoind and Bitcoin-QT are planning on switching to deterministic wallets by default, is this ...
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81 views

I just restored my Mac from a time machine backup, but no coin wallets got backed up?

Every other file seems to have been backed up and restored except I don't see any coin folders in the application support folder in the library. Did I do something wrong? Are these files ...
3
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1answer
173 views

Live Blockchain Backup

What is a good strategy for backing up bitcoind's blockchain files (not its wallet file) without having to take (e.g.) a bitcoind that is powering a counterparty-server instance offline? Copying the ...
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1answer
730 views

Where is the Mycelium wallet file stored?

I have a fairly straightforward question that's still unanswered after googling for days for a definite answer, I hope you guys can help me out with this one here. Background: I have Mycelium Bitcoin ...
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1answer
121 views

Error: Wallet backup failed! (code -4) when setting up bitcoin-qt for first time

I downloaded and ran bitcoin-qt to play around with. First thing I did was create a wallet passphrase. The second thing I did was try to create a wallet backup. Then I got this message: Error: ...
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1answer
43 views

How to restore a backup made when using the big 20 Gigabyte Core Wallet to current MultiBit wallet?

Been running an s3 with slush's pool for a month or so and accumulated maybe 20% of a Bitcoin. I started out using the gigantic Bitcoin Core Wallet because when I first learned about Bitcoin a couple ...
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1answer
26 views

What are the limitations to an outdated backup?

My backup private keys were made in Jan and my computer crashed in May. If I upload the keys on a new wallet, will it show my bitcoin balance from May or January?
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1answer
577 views

How many addresses does my wallet.dat contain? Do I need to make a new backup every time I make a transaction?

I'm having little problem here, trying to figure out the safest way to backup my wallet.dat to make sure that no BTC may be lost in case of recovery. I'm not sure how the process of adding new ...
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1answer
97 views

How often should I back up my wallet if I use Bitcoin-Qt client? [duplicate]

I am new to bitcoin and the first client I installed was Bitcoin-Qt (Bitcoin Core v0.9.3.0-gcea5e49-beta). After installing and downloading the blockchain I immediately created a backup file. The ...
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2answers
157 views

Unable to open Backup binary file Linux

I recently reinstalled Linux mint; I backed up my wallet, and I am unable to import the backup created from the original wallet (Qt version 4.8.6.) to the newly installed wallet(Qt version 4.8.6.) I ...
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1answer
531 views

Restore wallet.dat on windows 8

How do I use my wallet.dat on my windows 8 bitcoin qt? Someone posted this C:\Documents and Settings\YourUserName\Application data\Bitcoin (XP) C:\Users\YourUserName\Appdata\Roaming\Bitcoin (Vista ...
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1answer
87 views

Multibit saving after transaction - what do wallet private key backups look like, if they exist?

I sent some bitcoins from a multibit wallet to another wallet. I recently realized that the change not sent in this transaction is sent to a new address. This means I didn't back up the key of this ...
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2answers
130 views

How do I recover newly created bitcoin addresses from an older wallet.dat?

I had a bitcoin wallet and several other coins' wallets on my laptop and did a backup for my wallets several months before the laptop died. Between that time, I had created several new bitcoin ...
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1answer
42 views

One private key in different locations?

Can I still use my key pair to receive and send bitcoins, even if I imported the private key in another location? I wondered about this, when I planned to import a backup of my online wallet in a pc-...
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1answer
64 views

Can I limit the back-up data in wallet.dat?

I want to know is it possible to back-up manually from wallet.dat. I am running Dogecoin daemon locally. Scenario: say user (user1) have some dogecoin balance in addr1 another user (user2) have ...
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1answer
1k views

What happens if I delete wallet.dat?

I have this question, say I have my coins in my local wallet and 1 of 2 things can happen, say I somehow delete the wallet.dat file or some kind of malware deletes the file. I have the password ...
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2answers
701 views

Bitcoin-qt data on external drive

I have done the instructions listed here: How to move Bitcoin data from Application Support on external drive [mac] It works fine for a flash drive connected the mac, but I wanted to have the data ...
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1answer
803 views

Recover a bitcoin wallet in Hive

I've recently reformatted my Mac, and reinstalled Hive. I have a back up to Dropbox option enabled in Hive, and my old bitcoin wallet file is there. But I cannot find any way to recover my old bitcoin ...
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1answer
59 views

Restore New Funds after Blockchain Backup

If I transfer money into my Blockchain account after receiving my Json wallet backup by email, would it restore recently added funds?
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2answers
320 views

How do I test my wallet backup?

I follow the instructions for wallet backup and save them digitally. What's a convenient way to occasionally test my wallet backup. I want to make sure that I'm not doing something stupid & my ...
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1answer
507 views

I want to use another wallet.dat file with bitcoin-qt. Is this possible?

my situation is the following: I have a laptop with not much space on disk and therefore using bitcoin on a stick (I start bitcoin-qt with the argument "-datadir=location/to/stick). Now I wanted to ...
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2answers
885 views

Is it sufficient to backup the private keys of my android Dogecoin Wallet?

I installed the langhans Dogecoin Wallet on my android device and backed up my private keys. Is it sufficient to backup the wallet to avert loss in case of loss of or damage to the phone?
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1answer
3k views

How can I restore my dogecoin wallet (android client)

How can I restore my dogecoin wallet backup? It was created by the dogecoin android client and lives in my Google Drive account. This question already exists, but no answer is given for Android (and ...
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2answers
544 views

If I backup my wallet.dat once, am I forever safe?

I have a dogecoin (though should be similar to bitcoin/altcoins) wallet and I encrypted and backed up my wallet.dat file to a few different places (different cloud providers). Now, assuming I never ...
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1answer
116 views

Backup wallet of single account

As far as i know that online wallets as Blockchain.info is a Bitcoind instance that gives each user an Account and each account related to multiple addresses through JSON-RPC calls, how blockchain....
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2answers
5k views

Backing up my bitcoin wallet - is wallet.dat all I care about?

I know that there are many duplicates of this but I'm hoping that the way in which I word this explains and helps not just me, but others as well. In any of the coin wallet bitcoin and the alt coins,...
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3answers
102 views

What do I need to do to protect my wallet on my computer? [duplicate]

I am using Multibit. How to overcome if my computer burns off?
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1answer
202 views

How to keep Bitcions when reinstalling OS from fresh

I have the official Bitcoin wallet and I would like to do a fresh install of everything on the computer. How can I save my Bitcoins (and hopefully block chain)?
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1answer
81 views

What is happening after backup?

Let's say I have a wallet backup burned on a CD. In that moment I have 10 coins. And I start to make transactions. Then my hard-drive crashes and in the moment of crash I have 20 coins. When I restore ...
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2answers
739 views

Change addresses and key backup on Bitcoin Wallet for Android

I've had the Bitcoin Wallet for Android for some time. When I installed it I was assigned some public address/key. I have made various transactions in and out of the wallet but as fas as I can tell ...
2
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0answers
110 views

What to backup to save my coins? [duplicate]

Do I have to backup only wallet.dat or should I backup anything else to have my coins safe?
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1answer
5k views

How to recover an old wallet.dat file

Back in 2011 when bitcoin started to make the news, I created a wallet and let it run for a bit (no pun intended). It almost fried my computer so I stopped. In the process, I think I remember I mined ...
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46 views

Unconfirmed Transaction after Backup

I sent my bitcoins from one account to a new account I created. The original account was on a Mac Mini, the new account was on a MacBook Pro. The MBP dies and I am on a new MBP reinitialized using a ...
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1answer
1k views

Restore encrypted wallet

I need to restore a wallet created with bitcoin-qt which was encrypted. I have the encrypted wallet.dat file only. Do I restore this simply by replacing the current wallet.dat with my backup wallet....
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3answers
3k views

How to obtain the private key of an Armory wallet?

I have a paper backup, a digital wallet backup and all the passwords: how do I retrieve the private key for a watch-only wallet so I can send some coins out of it (created in armory and imported into, ...
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1answer
135 views

Sequence of events that can cause lost money in MultiBit

If you create a new address in MultiBit, then transferred money to the new address before the wallet was backed up, then your hard drive crashed, will you lose the money? The first Bitcoin client had ...
3
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2answers
214 views

What situations will you lose your bitcoins during backup?

I read this paragraph from bitcoin.it but I don't get it completely. The wallet contains a pool of queued keys. By default there are 100 keys in the key pool. The size of the pool is ...