Use a hex editor to potentially salvage your save:
Select your primary hard drive or cloud storage allocation, and navigate into . Scroll down to WWE 2K15 and press the options menu. Wwe 2k15 Save Error Fix
Delete local file copy, allow automated Xbox Network cloud profile resync. Preventative Habits to Avoid Future Save Corruption Save failed - system storage access error occurred Use a hex editor to potentially salvage your
Windows may block the game from writing data to your hard drive. Wwe 2k15 Save Error Fix