My largest world (about 115MB) appears to have disappeared from my xbox. I checked the storage settings in the game and it is missing from that list as well as the list of worlds. I was on the world the day before it disappeared and nothing abnormal seemed to happen in the world or on the xbox. I restarted both the game and the xbox multiple times and the world is still missing.
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Did the world go missing after a crash or a power loss? If so it's likely that the world is present but not recognised as it wasn't saved correctly. The best chance of restoring the save is to not reinstall the game and await a future update that will restore the save in many cases.

No there was nothing abnormal, I just saved and exited the world and turned of the xbox as I usually would.

No there was nothing abnormal, I just saved and exited the world and turned of the xbox as I usually would.

Thank you for your report!
However, this issue is a Duplicate of MCPE-35364.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
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Thank you for your report!
However, this issue is a Duplicate of MCPE-35364.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
Did the world go missing after a crash or a power loss? If so it's likely that the world is present but not recognised as it wasn't saved correctly. The best chance of restoring the save is to not reinstall the game and await a future update that will restore the save in many cases.