So I have a world I have been building for over 5 years, started it on the Xbox 360, converted it fine to the Xbox One, but now Im having the same issue each time I try to convert it to the newest version. My world size is 350.3 MB in size, has had books written in it in the past, (Book & Quill) which I have guessed is causing alot of save file errors before this problem. I have never modded my world or done anything unusual with the save, besides occasionally renaming or copying it. The world is also a Large size world and has probab;ly 100,000's of blocks placed on it by now in creative. Don't know what else to say, my internet is at 50mbps and I think I may have one of the first xbox one systems that came out, meaning the hardware within the console may be inadequate and might be causing the crash. I can get as far as syncing the old worlds to show up in the list, I can the then choose one to convert, but when I do choose that one main world of mine the game crashes each time at 3% conversion, once t made it to 4%. Im sure your all working hard on this already and Im fully prepared to accept the fact that I will never be able to convert my world., in which case my 5 year-long project will have to end, even now Im holding off on building it for fear of just making the save file bigger and never getting it converted. Basically the new game has destroyed my will to build lol, not good for business I imagine.