I played with Bitcoin a while ago and while I have very little in my wallet I still think it would be a shame for it to be gone forever. So I wan't to keep it backed up while not backing up the constantly changing gigs of other files (I don't understand why they are in roaming...).
So here is a simple regex to backup a single file:
.*/AppData/Roaming/Bitcoin/(?!wallet.dat).*
Does not work:
.*/AppData/Roaming/Bitcoin/(?!wallet.dat)
It uses negative lookahead to not match the wallet.dat, it doesn't consume any characters so the .* consumes anything left over. It is worth noting that this also matches any files starting with wallet.dat so you could also use this to exclude all files except ones prefixed with something or exclude everything except a specific folder.
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