I have a bunch of items but nothing cheated in, also I don't use the magic storage, it's not individual save files, also searched on google the error message but it doesn't help, since I never have this issue with other apps that take up far more space. Tried clearing cache and that doesn't work either, my phone still has a lot of space left so it's not a storage issue either. Only solution I have so far is to delete some saves, then it lets me make new saves. So now I just export my saves each time and then delete an older save and this works.