Re: My Sims 4 game is reset but all save files are still there
@ScoobyM Please confirm that your saves are in the correct Sims 4 folder, as in, the one the game is reading. Here's how to check:
https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/
If the saves are in fact in the correct folder, please move the entire Sims 4 folder to the desktop, open the game to create a new folder, and move one save from the old folder to the new one. Let me know whether that save shows up. If it does, you can move a few other saves over and test those too.
If the save doesn't show up in the new folder, please take a screenshot of the contents of the old saves folder so I can see what your save files look like, in particular how they're named.
The other Sims 4 folder you've found contains the game's program files, as in, the data Origin installs and that runs the game. Inside that folder, each pack you install has its own folder, named by type and release order. Kits are organized like stuff packs, so SP31 contains the data for the newest kit. You definitely shouldn't mess with these files, although if you did, repairing the game in Origin would probably fix any issues.
This folder is handled separately from the Sims 4 user folder, the one that contains your saves and other user data. The location of one has no bearing on where the game looks for the other.