DLNA Shows No Files (GL-MT3000)

I am struggling to get the DLNA server working on my GL-MT3000. I have tried both a traditional usb stick and a travel SSD, both of which are recognized by the router and allow me to enable the DLNA server. I have 2 clients that can see the server but both report that it is sharing no files.

I have tried multiple picture and video formats but it still shows nothing. Using the GLINET ios app, I can access and view the files from the router. I’m on the 4.6 beta firmware (captive portal support) if that makes a difference. Thanks for any help.