For , the save system functions through manual saves typically located in your Windows user documents. Save File Locations
and navigate to the Savedata path mentioned above.
With the rise of the Steam Deck, many players want their old savedata.dat to work on Linux (Proton/Wine). The good news: , but with two caveats.
Windows Security may block the game's .exe from writing to your Documents folder. To fix this, go to Windows Security > Virus & threat protection > Manage ransomware protection and either turn off Controlled folder access or add the game's executable to the "Allow an app" list.