Re: I reinstalled origin and ts4, can't see old saves/sims

@Rowlena  Try creating a clean folder and placing your old saves there.  First, move your entire Sims 4 game folder out of Documents\Electronic Arts and onto your desktop.  Launch the game, start a new save (no need to spend much time on it; this is just for testing), save, quit, reload to make sure the save is still showing, and quit again.

Now move just one of your old saves from your old game folder to your new one.  Don't move any mods or cc, or any other files.  Make sure the save you move ends in .save, not .save.verx (or delete the .verx extension), and that the save you're moving doesn't have the same number, likely 00000002, as the save you just created.  Reload the game and see whether your old save is available to load.  If it is, you can move your other saves over as well; be sure to check whether they also show up.

If the save you move isn't listed at the Main Menu, put it aside.  You can still try your other saves, including the ones with a .verx on the end (again, delete the extension).  Just make sure you're never moving over two saves with exactly the same name, since you don't want one to overwrite another.

You can also move the contents of your Tray folder from your old game folder to the new one, and hopefully the households and builds you've saved will show up in the in-game library.  It's more difficult to move Tray files over in batches, since each library entry has several separate files associated with it, all of which need to be present.  But you can try sorting by last modified date and moving them in groups.