It’s happened to all of us. Files lost in some cyber-nightmare. Computers. We rely on them for our composition, but must always remember the words of the Prophet Mohammed: “Tie Your Camel.” You know what I’m talking about here. “Oh, I’ll get to it soon,” are famous last words. Regular back up is a necessity while working on anything using computers, which, like all things in this world, are subject to entropy and degradation. Back up is just a normal part of your work flow.
A close client has just lost 4 months of valuable work, nada, gone, kaput. Just like that. And not because she didn’t back up. She did, or the person who does her tech support did it for her. The issue was with file names: two files with the same name in different areas. He backed up the older one, not the most recent. Then the most recent was trashed. Regular back up would have lessened the gap between those versions of the project. File naming the different versions also helps. All this is totally visible in hindsight.
Word to the wise: back up your work!
And by the way, I also keep all the older original versions in case I need to go back at any time. Even when a project is “completed” I keep them for a time, just to be sure. Anal? Probably. But it has come in handy more than once.