In the offline mode of "Frost Age 2", losing saves is a thorny problem. Don’t worry, now a solution is brought to you. From checking game files to restoring backups, through a series of steps, you can hopefully recover your lost saves. This allows you to continue playing without having to worry about lost saves.
c drive: /Users/appdata/local/11bitstudiosFrostpunk2SteamSavedSaveGames
1. Create a new archive and name it 123 (try not to use Chinese)
2. Find both 123 and your previous save in the save location.
3. Delete 123 and change your previous save name to 123
4. Load the game. Tip: It is best to open the game to perform the above operations.