Missing weeks of building data on my creative map

I logged into my mine craft account on another console . Once I did I notice that I was missing over 50 mb of build data . Went from 99 mb to about 44 mb. I do not quite remember the date it happen. I can only hope you'll be able to find the day I logged into another Xbox one and find my missing data. Please do help. I'm so stumped I haven't played . And also IDK if it's possible to link my Xbox one maps with my pocket version. Please do get back with me. Huge fan of the game. Thank you .