How do you rename MyCloud Home Duo on your network?

I just setup DUO and it seems to work but on my network, it shows up with some random name → MyCloud-041149 which I want to change to what I want and I can’t find a way to set that up.
Also TimeMachineBackup shows up but it’s only available as guest. I can’t find a way to set up a user account as MyCloud Mirror. I read the manual but it doesn’t specify that.

Isn’t this ideal usage for TimeMachine backup?

Hello,
You cannot change name of MCH.
TimeMachine share is only available as Guest → please encrypt your backup

You need WD Discovery to create users and get access to private spaces.