Backups? How do you "do it"?

Very simple, for sprite sheets I have a Folder for that, and then for monsters and editors I have a Folder for that. I also keep a Backup folder with all the Roms with the changes I have made, sprite-wise, music wise and whatever else, I also keep a few vanilla roms handy in case something goes awry. Mine is sort of off the cuff, I may try this or I may try that, I am just trying a lot of things with animations, sprite sheets, and some editing to see what I can create as far as hacking FF6.