I was getting the same 1122 error with a external USB 3.0 Toshiba Canvio 1T hard drive. Changing the default name for the USB hard drive did not solve my drive failing to be mounted properly. What did work in my case was deleting the partition(s) on the external drive, repartitioning it then reformatting it. Only then did the My Cloud v4.x firmware properly mount the drive. There is a lot of detail on my trek dealing with this issue in the following thread (which comes up when doing a forum search for “1122”):
https://community.wd.com/t/this-is-absolutely-unacceptable/149432/8
