This may be addressed by the time the 1.14 update drops on Switch, however, my Realm world which I uploaded from Switch is about half a Gig (514 MB) in size, however when I attempted to download a backup of the most updated version of the world to my local device the game claims that the file is too large and that I don't have enough storage space, despite having over 25 GB of space (6.5 GB on-board & 19 GB on SD Card) available on my device.