If you go to that specific folder, there will be 4 save files.
Game is your current save file
Save_backup_file_1,2 and 3 is your backup
You can update these backup by manually save in the game.
If your current save file is corrupted, you can change your save file by changing the name of “Game” file into something else and changing the “save_backup_file 1” into “game”.