I've been playing a season with 2 teams, both around 12 matches completed, and when i try to save it now, i get an error: "insufficient space"

There's 12Gb free on the my doc-drive and 23Gb on the drive where it's installed. I tried restarting the game, and i can load my save, but when i try saving it gives the same error.
a friend of mine has had the same thing, only his savegame was totally fucked up afterwards...
What can i do??
