I thought your questions were answered in your previous topic by Joerg_A in the third post to that thread.
https://community.wd.com/t/how-to-sync-two-mycloud-at-different-locations/145528/3
The My Cloud Mirror supports Remote Backups, see the My Cloud Mirror User Manual, Chapter 7, Remote Backup, page 74 for more information on how to setup and configure Remote Backups.
For the My Cloud EX2, see the My Cloud EX2 User Manual, Chapter 7, Remote Backup, page 69 for more information on how to setup and configure Remote Backups.
