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Using bitcoin-qt, multibit, or any of the others, how do I backup and save my wallet in case I need to reinstall Windows?

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Possibly related - bitcoin.stackexchange.com/q/746/323 –  ThePiachu Jun 20 '12 at 22:38

1 Answer 1

bitcoin-qt

  • open the File menu
  • click Backup Wallet...
  • select a file to save the backup as

MultiBit

From http://multibit.org/help_backupWalletUsingPrivateKeys.html:

You can export your private keys from a MultiBit wallet into a file (using the 'Tools | Export private keys' option) and, as long as you do not manually create new receiving addresses, you can use the private key file as a backup for the wallet.

Armory

From http://bitcoinarmory.com/index.php/start-page/what-is-armory/features:

Not only are the wallets determinstic, but there is a built-in dialog for printing permanent copies of your wallet. When you first create your wallet, make sure your printer is on and click the “Paper Backup” checkbox.

Electrum

From http://electrum.org/:

You do not need to perform regular backups, because your wallet can be recovered from a secret phrase that you can memorize or write on paper.

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