Channels DVR on NVIDIA Shield - Help

I probably just don’t get it but I can’t get Channels VR to work on my NVIDIA Shield. This is what the channels web site says when I sign in.
You’re almost there!
(check) Subscribe to Channels DVR
(Not checked) Install DVR software on your computer or NAS

On the NVIDIA the screen says DVR enabled and network server active.

I have a WD My Passport 2TB HD plugged into the NVIDA and it recognizes it. I didn’t format it or do anything to it other than plug it in.

On the ATV, Channels says to go to a web site and authorize use of the remote device for DVR.

I swear it has to do with the HD but if I format it on the NVIDIA it will encrypt it and it can only be used on the NVIDIA. Before I try that, I wanted to be sure.

What do I need to do?

Enter the URL listed on the SHIELD into your browser

Getting closer - thanks. I established the NVIDIA as a PLEX Server in the meantime and now the Channels DVR does not have write permission to the drive to create a folder. Did I screw it up?

Got it myself. Thanks