Your MK8 Save File wasn't overwritten by the other user was it ?
Yeah, I meant the internal storage. And no, it hasn't been overwritten since the other user also has quite a few things and for me its like at the start. I guess backing up the file on an external device is an option as tedious as it is. I think what could've caused the memory to wipe out is the fact that I turned off the console in the middle of a race. Maybe the file corrupted or something.