Cannot save my world, as the file size has reached the limit at 953.1mb. This is an issue many people are having when their worlds reach that exact file size. The game is telling me I have no storage space (I verified this is not the case, I have plenty of storage space). I have no texture packs other than the original, and even deleted all my other worlds.  Due to limits on world file size that seem to be coded into the game, it will no longer save. When a new chunk is loaded, or the game attempts to autosave, I am presented with the storage space error, then my world automatically closes. I am also unable to upload it to my Realm, due to other file size limits in place with Realms. My world is now unplayable, as well as my backups of similar file sizes. I've tried on multiple systems, on multiple networks and nothing I do has fixed this, as it's an issue with the game not allowing worlds larger than 953.1mb to be saved. This issue only occurs on this world and worlds of similar sizes, because the file size is so large. If I start a new world, I have no issues. Only the ones that are close to 1gb. I have hundreds, possibly thousands of hours on this world and now I'm unable to even play it anymore. I'm at a loss. If this can't be fixed, I'll have to buy a PC and switch to playing Java.

TL;DR, When worlds approach such a large file size as 1gb or close to, they no longer save due to an issue with file sizes having to be under a small amount.