Download the verified SaveGame_100.sav file. Rename it exactly to match your save slot. For example, if you always use Slot 1, rename it to Save1.sav . Then paste it into the SaveGames folder.
and delete the local save (after cloud backup) or power cycle the console by unplugging it for 30 seconds. to the cloud or a USB drive?
If you want, tell me which platform (Windows/Steam/GOG) and whether the save is readable text or appears binary, and I’ll give exact filenames and a more specific edit to perform.