Have you ever had several copies of the same file on your PC? I tend to make duplicates of files before I edit them, this is especially true with graphic or video files – even config files for that matter. That way, when I make serious mistakes, I can always go back to square one.
The only problem I have, is that there are several revisions of files wasting my drive space, files I’ve had for years, that I’ve never cleaned up. Time for some spring cleaning.