I recently bought a Nvidia Shield, and intended to use it as a PMS.
My plan was to attach my HDD to my router (TP-Link Archer C2 AC750), and mount the storage to my shield. Now, I enabled Storage Sharing in the Routers settings and allowed anonymous access to all volumes. But the drive doesn't show up in the Shields settings. It even says that storage sharing is based on NetBIOS / SMB-Protocoll (Router). The Drive shows up on my PC and I can access and transfer files to it, after I've set it up. I can even see it in ES File Explorer on my phone. The only device where I can't see it/mount it manullay, is my Nvidia Shield. I always get an error saying "null is not available" or "failed to connect to network". I've even tried it with another drive (both NTFS) still nothing. Something else that I should maybe mention is that the Tp Link router is set up as a Acces Point. So it's connected to another router through ethernet. I used this guide: http://www.tp-link.com/at/faq-417.html.
I'm really frustrated and consider sending the Shield back, because this was the main way I wanted to use the shield combined with Plex, but it doesn't seem to work no matter what I try.
Hopefully somebody can help, I would really appreciate any suggestions.