Sync To My Cloud option; not available on right click for additional drives

Just installed My Cloud Home, and installed WD Discovery.

When I go to File Explorer, there is no option to “Sync to My Cloud” on my D: drive, or on my directories on C:
The only directory that has this options is : “C:\users\xxxx\OneCloud\Documents”.

I need to be able to sync my D: drive and other directories. Has anyone seen this issue or resolved it?