When I try to load a specific world it will always say "synching user data" and I'll inevitably get a failed to synch pop up along with the Xbox error code (0x80830003) and the text "we can't save more data for this game or app". This error only appears for one of my worlds. The world size is 3.9 gigabytes and occasionally the entire storage of the game itself will increase by this much despite the world still being inaccessible. Occasionally I will also get the Xbox error code (0x83860012). When my world was able to be played on I was still unable to get it to save to the cloud. If I left the world it would show the message "cloud quota is full". Deleting world's doesn't fix this problem. I can't play this world on realms but i can play this on Minecraft preview. This has persisted into the Trials update.