it is important to realize that Apple TV, as a product, offers no file management or global backup method, or any way of taking a backup copy of the Minecraft datafile that relates to a particular world. I have just confirmed this with Apple.

SURELY MOJANG CAN AT THE VERY LEAST OFFER IN THE NEXT VERSION FOR APPLE TV THE ABILITY TO BACKUP A WORLD LOCALLY OR EXPORT A FILE SOMEWHERE !!!

Many thanks