Hello,
I have a WD My Cloud ex2 ultra that is working fine. It has a usb drive attached
My MacBook Pro has complete access to the WD including the USB drive.
Time machine on the MacBook Pro writes backups to the USB drive.
The problem is with the Macbook air, Finder allows access to the USB drive
Time Machine doesn’t see the USB drive but it does see the NAS and is willing and able to create backups to it.
I want the backups to be written to the USB drive.
Can someone please help.
SOLVED… USER ERROR 
Thank you
