Instructions:
1) Go to: C: \ Users \ “username” \ AppData \ LocalLow \ CampoSanto \ Firewatch \ saves
2) Transfer all files to a USB flash drive, because if you lose data, nothing will be saved.
3) Go to the archive you downloaded.
4) Go to the save folder.
Firewatch: Save Game (76 days) Free Download
5) Move all files to the saves folder.
6) Enter the game and enjoy!
The save folder has a Photos folder that contains 3 photos. You can take a look if necessary 🙂