Cant export my map to realms, it keeps crashing my game and sending me back to the xbox home screen

I bought the 7.99 realms package and went to export my map to realms, follow the directions, it starts the export get 3/4 of the way thru the export and the just crashes the game and sends me to the Xbox home screen. This all started because i got the pink and purple screen of DEATH telling me i need to free up space for the map to work! This is the only map i had on my Xbox game! Total of 2.2gb!!! I dont want to lose months of work i have done with my three friends!