That is indeed true .... well I have Kodi on Shield but will more likely use Plex for the NAS. The new NAS is significantly more powerful than the old one and I have that now ... just trying make financial provision for the new drives to populate it! New 4 WD RED 12TB drives ... only managed pick up one at the right price so far.As you said this issue is only temporary one as I'm assuming that you will be using Kodi on Shield as your media player for the movies stored on your NAS.
Mind you I have to say that having only just starting using decent make and size USB sticks direct on the TV that this is far from a poor option.
So you right, the new NAS is key but would still be nice set the GZ2 up to be seen and accessible from a PC. For example, I had an HDR version of Joker (9 GB file) that required a move to the USB and then plug in TV. Would be idea to be able just move that from WIN 10 Explorer to the stick on the GZ2. That's what I'm missing the logic on.
I can see the GZ2 and the Shield but Win 10 not allowing me map them. I'm sure it's my limited/intermittent Windows knowledge not the TV.