Whether you are using a standard Steam installation or a portable version, installing a save game is relatively simple. The key is finding the correct directory.
The AppData folder is hidden by default. If you can’t see it, enable “View hidden files and folders” in Windows File Explorer. fernbus+simulator+save+game+100+portable
After starting the game once with the new save, you can turn Steam Cloud back on. Steam will ask if you want to upload local files to the cloud; choose "Local Files" to ensure your 100% save is backed up. Whether you are using a standard Steam installation