boston

I have had this problem too since I made this realm after the Nether Update.  I am currently playing on 1.17.10 where the upload will load but "initialize upload" sitting there for 5 minutes until it realizes an error has occurred (only if you archive Minecraft on a switch).  Worlds in 1.17.10 do take up quite some space, mine being around 370mb.

I am quite upset that this hasn't been completely fixed, although it was slightly worked on in 1.17.10. This world isn't caves and cliffs experimental btw.

I pay for a 2 person realm and am trying to put the same world on my 10 person realm.  I'm spending a lot of money and want this to be fixed soon, as I have spent hours trying to troubleshoot.

This just started happening today but realms has been having alot of problems for me lately and I'm kind of feel like I'm not getting what I payed for.

I think realms shouldn't be purchasable until this problem is fixed.

I am kind of hesitating to continue for my bedrock realms subscriptions because this has been a major problem for bedrock realms owners.  I really hope this resolved very soon.

This problem has not been resolved on the switch for 1.16.4

This happened to me as well.
It says the realm will shutdown for "maintenance."