I play on XBOX 360 and its not completely upadated to the version now. It autosaves every 30 minutes. So I was mining and making like a staircase to a place and I put a lot of effort in it, just because. Then my brother comes in and turns off my XBOX WITHOUT ME SAVING IT. I mean he didn't erase a lot but it took a lot of time and stuff to get the materials and I just rage quit.