The solution for some of us who have experienced the failure to mount a USB drive issue with the v4.x version My Cloud’s was to delete the partitions on the USB hard drive, then reparation the drives, then reformat the drives. Obviously one has to remove or backup any existing user data on the drives (if they want to retain it) prior to deleting the partition(s).
I discussed my initial issue and my subsequent solution in my case in the following thread.
https://community.wd.com/t/this-is-absolutely-unacceptable/149432/23
In my case, for what ever reason the out of the box formatting on a Toshiba Canvio 1T drive was the issue. The thread above has some log/data dumps in them that show the My Cloud saw the drive as NTFS, which it was, but was treating the drive differently somehow and for what ever reason simply wouldn’t mount the drive.
