Murray's world ran out of data storage space.

I explored so many blocks that I went out to X=48000 and then to Z=66500 and then went to X=around 28500 and around Z=65500 to find a woodland mansion and on my way back to my base at around Z=20000 and X=17000 it said that my world seed -1987910270 was out of storage space. Even when I tried to load my world a few times after closing the app and opening it a few times it still said that there was a problem loading my world.