The folder named 857 is typically for Steam versions, while 720 is for pure Ubisoft Connect versions. Some players have successfully transferred saves between these folders by copying data from 720 to 857, but make sure to disable cloud syncing before doing so.

Which did you use? (e.g., Reloaded, 3DM, fitgirl repack) What error message do you see when the save fails? What Windows version are you currently running?

Search on sites like SaveGame.pro or Nexus Mods for "Assassin's Creed Unity Save File."

Once your saving mechanism works properly, follow these maintenance rules to ensure your progress stays safe:

Assassin's Creed Unity is a phenomenal game, but it requires a bit of maintenance to run properly on modern systems. By ensuring your crack is up-to-date (CODEX/RELOADED), managing your folder permissions, and keeping your antivirus in check, you can avoid the frustration of lost progress.