Copy your save folder to a cloud drive or a separate folder on your PC after every long gameplay session.

What or patch number are you currently running?

The "Best" fix depends entirely on you are using. Saves are not universally compatible; a save from a v1.2 cracked executable will not work with a v1.5 executable, and different cracking groups use different save locations.

Download the save file (usually formatted as 0x1.sav , 1.save , or similar numeric files).

Navigate to the savegames folder. You will likely see a folder with a number (e.g., 720 ). If this folder is empty, the game is failing to write to it.