# Re: Lost large number of bitcoins

Post by: satoshi on August 11, 2010, 09:46:51 PM

Quote from: sirius-m on August 11, 2010, 02:01:53 AM

> I added to the FAQ the warning to back up after each transaction. Is it necessary btw to stop the client before making a backup? That's a bit inconvenient. Automatic backups would be useful indeed.

You can get away with backing up without stopping the client if you don't do anything or receive a payment within a few seconds before the backup.  (like 5 seconds)

Quote from: gridecon on August 11, 2010, 08:46:08 PM

> Wait, I'm confused again. I thought the essence of the surprise was that Bitcoin is programmed to "empty your wallet" for EACH transaction.

No, it doesn't usually empty your wallet with each transaction.  It uses the smallest set of coins it can find to add up to near the amount.  In this case, unfortunately, his wallet had a single 9000 BTC bill in it, and it had to break it to get 1 BTC and 8999 BTC change.

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