How to STOP mirror expansion process?

Anybody know how to STOP a My Cloud Mirror expansion process?
My situation is that a few weeks after successfully expanding a My Cloud Mirror (Gen2) from 2TB to 4TB I realized that I needed to access data on the 2TB drives that were sitting on the shelf. I read that I could access those drives using a RAID roaming process by putting them into a new enclosure. So, I managed to acquired a used enclosed that’s in good working order and installed the drives. Only trouble is the drives began the expansion process all over again, and I can’t figure out how to stop it so that I can initiate RAID roaming. I’ve read that a rebuild will destroy the data, so I don’t want to do that. Any ideas would be appreciated.

Hi wspalding,

You can contact WD’s Technical Support about this.

To Contact WD for Technical Support: