Well, it is working as expected. I created a dedicated folder within the same volume to store the torrent file and Transmission folder. I can bookmark the UI and access Transmission independently via web browser so that I don't need to login to Dlink NAS to do. Everything is working perfectly. My Dvico Tvix 6400N upnp detect Transmission folder flawlessly/wirelessly and I can access it right on my tv screen. No issue with subtitle etc as the media player decodes the media files.