Departure from the game

I with friend (he with the phone played) survived my world through xbox live. But when I wanted to go to my base with the horses, my game hung and flew. Then I re-entered the world but I was at the point of AutoSave. And I went anew in base and I have again took off. I then understood that I have when I already close to its base and again crashes. I tried to copy the world and export but it didn't help. My laptop memory is fine.