Upgrade hard disks


I have a WD My Cloud Mirror model WDBZVM0040JWT, it is currently configured with 2x 2TB disks in RAID 1, I would like to upgrade these to 2x 4TB also in RAID 1. Please could someone supply the procedure for doing this, I would need the existing configuration and data to be moved to the new disks.


login to a dashboard and go to Storage/RAID then click on Change RAID Mode and on that page click on Expand RAID.