That is an internal xbox error, saying that local save space on the console is full, we don't have control over it (as you can see from the dialog the actual cloud storage space for the game has plenty of room)
All you can do is follow the advice in message it gives.
im having a similar problem but with a different message, the game is telling if i want to save my file i have to delete other save files but there is no longer any of the files (not even the 2 backup files for this save or my other save) whenever i go to load, save or save as.
i think the console game needs a ton of work as I've had this problem before losing a save i was 6 years into and know its happened to others and despite complaints being sent in no update has fixed this
FM23 Xbox Series X Save game size issues
in FM Console and FM Touch General Discussion
Posted
im having a similar problem but with a different message, the game is telling if i want to save my file i have to delete other save files but there is no longer any of the files (not even the 2 backup files for this save or my other save) whenever i go to load, save or save as.
i think the console game needs a ton of work as I've had this problem before losing a save i was 6 years into and know its happened to others and despite complaints being sent in no update has fixed this