I have a new computer, and my Bitcoin keys are on my old PC.
- Is all of my private data in wallet.dat?
- What is the procedure to make the transfer properly from my old PC to the new one?
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Your wallet.dat file records all of the important information. I don't know if the other files also contain confidential information, but two things are sure:
The other files are mostly just the downloaded block chain history. If you lose those, you are in for a big download, but nothing too serious.
It looks like you do just have to backup/transfer the wallet.dat file.
From their FAQ:
How do I backup my wallet?
Your wallet.dat is stored in the directory ''%appdata%\Bitcoin'', which is typically:
Windows XP: C:\Documents and Settings\username\Application Data\Bitcoin
Windows Vista: C:\Users\username\AppData\Roaming\Bitcoin
You need to make a backup of the wallet after every transaction, as the old backup file will be partially or fully invalid. Wait at least a few seconds after your last transaction before making the backup.
If you want to encrypt your backup, you can use some program like TrueCrypt. An in-built tool for encrypting your wallet will be included in Bitcoin later on.
I had this problem on Mac OS 10.5.8.