My SIms 4 save files keep disappearing

@bridgerex26  There's no way that Sims 4 would delete your saves stored in other locations.  I can see how it might manage to delete saves stored in Documents\Electronic Arts\The Sims 4\saves, and it does have permission to write to the Electronic Arts folder, but there's no reason the game would even be able to find all the duplicates not in the Documents directory.

Do you have a cleaner app or something similar installed on your PC?  Many of these apps will, among other things, scan for duplicate files and remove all but one copy.  This can be manual or automatic, so you might not even know it happened until you went to look for your backups.

For what it's worth, posting in this particular forum isn't likely to get the attention of anyone working on Sims 4.  This forum is mostly players helping players, with the occasional EA community manager popping in, but they're forum organizers, not Maxis developers.  While major issues do get forwarded, most threads never get seen.

If you do want the devs to take notice, then to be honest, you'll need more than just "my saves keep disappearing and I've ruled out the usual issues."  I don't know what's happening on your particular computer, of course, but like I mentioned before, most people with this issue find it's caused by OneDrive or their systems moving files around, clearly nothing done by the game itself.  True, many posters never come back, but other than the issues copying files to the Legacy Edition folder, I don't think there are any recent examples where it's been demonstrated that the game itself is outright deleting files.  So people are going to assume that's not happening until proven otherwise.