Quick question. In my WTF folder, savedvariables have a backup created automatically for each of them. Anyone knows when/how these files are created and if/when they get updated?
For some reason, I've had WoW crash a few times on exit/log out these last 2-3 days and it corrupted several of them every time. Thank god there's a PTR up at the moment, and I had copied many of them over, but still, now I want to know.
When the SVs are loaded, they will be copied over to .bak files if-and-only-if the .bak file does not exist. I've never seen the .bak file updated after that, so if you want to update them, delete them. :-)
I tend to do backups by periodically making a copy of the entire WTF folder. Other stuff in there besides SVs need to be preserved.
I had a theory that new .bak files get created after some patches, but I haven't really paid attention. Usually I just delete them periodically and make a compressed archive of my entire WTF and Inteface\AddOns folders.