I’ve been there — once, I opened five different versions of a budget spreadsheet and still wasn’t sure which one was correct. The fix was to agree on a naming format for every file and assign one person per project as a “file keeper.” They ensured documents were in the right folders and archived old ones. I also learned on
https://ejoi2018.org/ how naming rules work best when combined with permission controls. It prevents files from ending up in the wrong place in the first place. Since implementing this, our shared drive looks tidy, and everyone knows exactly where to find what they need.