If your save is beyond repair:
I navigated to the Steam user data folder (usually C:\Program Files (x86)\Steam\userdata ). If your save is beyond repair: I navigated
Naruto Shippuden: Ultimate Ninja Storm 4 is the pinnacle of anime arena fighters, but nothing kills the hype faster than seeing the "Save data does not exist" error message. This glitch often occurs on PC (Steam) and consoles after a crash, a system update, or when moving files between directories. Steam Cloud is the most frequent culprit for this error
Steam Cloud is the most frequent culprit for this error. If the local save file and the cloud version have a "handshake" error, the game may default to creating a new save, effectively hiding your old progress. and head to your Library. Right-click on Naruto Shippuden: Ultimate Ninja Storm 4 . Select Properties > General . Toggle off "Keep games saves in the Steam Cloud." Right-click on Naruto Shippuden: Ultimate Ninja Storm 4
How to Fix "Save Data Does Not Exist" in Naruto Shippuden: Ultimate Ninja Storm 4