Reminds me of the time a group I worked for at a National Lab decided to call the root folder for their project “core”. I bet you can’t guess what filename the backup scripts were configured to ignore…
Makes total sense - the core is the part of the apple everyone throws away.
This is an expensive lesson I think everyone gets to learn at some point. There's no such thing as a file worth excluding from a backup, it always fucks you, some (like me) more than others. Have to buy twice as much disk? Fine, at least you know you actually have a backup