The fix depends entirely on where you bought the game. Brotherhood has been ported across multiple launchers, and each handles saves differently.
Open Ubisoft Connect, go to your game page, click Properties , and choose Verify files . Method 1: The Cloud Sync "Reset" how to fix damaged save game assassin 39-s creed brotherhood
Ubisoft Connect keeps up to of your saves. Most people don't know this. The fix depends entirely on where you bought the game