Hello, I would like to know the proper way of making a backup copy of the blockchain as I need to reformat my Win7 OS.
In the previous Bitcoin-QT client (0.7.something) that I have used, I just make a copy of the blkindex.dat and all of the blk000n.dat files in order to make a copy of the blockchain.
But now in Bitcoin-QT client 0.8.1, I'm not sure anymore what exact files are needed to be copied.
If there's already a thread that has answered this question, I'd be happy to check that out.
Thanks in advance