Randomly, It will say I ran out of space and kick me out of the world. It gives the same message to other people who join the world. So far, I have lost 4 copies of my survival world. I make copies of my worlds in cases like this. When I am kicked out of the world, I am unable to get back into any world unless I restart Minecraft. I have over 200 GB free on my hard drive. when I make a copy of the corrupted world, it fails. Exporting the world is successful but importing back into Minecraft gives a "something went wrong" message. I haven't used any cheats, mods, plugins, or world editors. My pure un-modded survival world is a victim.