I was about 30 hrs in, and my little brother wanted to try play, he made a new game and erased all my data, because the autosave system saved over my game.
So i tried to disable the autosave feature so i could start a new game, and not erase his data, but noooooo. No way to disable to autosave feature. So i guess now i have to start a new game and save over all his files, which im sure tomorrow he will start a new game and save over all my files XD.