I have had a similar experience. See this post: https://community.wd.com/t/4tb-wd-no-longer-works/84611/10.
However now that Win 10 is pretty well established on a whim I tried other versions of chkdisk to see if I could still load my hard drive from a win 10 pc. I had a 3TB Seagate drive and the WD TV Live Hub only recognized a movie file if it was in the root folder. All other subfolders were “not there”.
I downloaded this version of chkdisk, http://www.majorgeeks.com/files/details/checkdisk.html and ran it on the drive before hooking up to the WD. This worked and now all subfolders were found and indexed.
There is something about Win10 and the drive interface that the OLD firmware on the WD does not recognize. Running this other chkdisk utility is a easy fix.
