Here are my findings with the DLNA server on my network. I have a USB 3.0 3T desktop drive plugged into the usb port on 827 router. I installed shareport and can see the drive just fine on any of my machines. However the DLNA server only refreshes its share list, when changed, when the USB drive is either unplugged via power or USB connector, very inconvinient for me. Also it seems if you put a MKV file on the drive and reset, it will only refresh your list till it hits the MKV file and stops not showing the rest of your files/media (pulled some hair out till i figured that lil glitch), remove the offending file and reset and the media list comes back. Lastly I found if you create a folder with shareport and copy media to the folder via shareport and reset, then scan with DNLA client you will not be able to see the new media folder/files. The only way to see the folder and Media is to directly copy the folder/files from my desktops USB port to the drive then plug it back into router and then the new folder and media can be scanned by my DLNA clients. Lastly Lastly is when resetting/rescanning the media drive it changes its folder name, STORAGE(A1) to STORAGE(B2) forcing me to remap the drive on each of my network machines, a bit inconvienient as well.
tested with: WD Live player, VLC player, IPone DLNA client. I also use 2 - 2T Iomega DLNA network drives that work flawlessly on my network. May I suggest a "rescan DLNA content" button in the 827's GUI like my iomega drives.
thanks
bladerunner