What is Mafia 3 Save Game Folder? How do I manually back-up my Mafia 3 saves?
Heres a method to copy the savegame to your other pc manually, in case you want that as a temporary solution.
Go here C:\Users\X\AppData\Local\2K Games\Mafia III
(Replace X with your windows username)
Copy the 2 folders to a usb, and bring it to your other pc and copy it back.