netgear ex6200 - upnp with a external harddrive

Hey all, my music streamer usually connects to a router and plays music fed from my laptop's upnp which is also connected to the router.

with the ex6200, can i hookup an external harddrive to the usb port and a raspberry pi with upnp on one of the ethernet ports and will the raspberry pi be able to see the external harddrive?

And if i hook up the music streamer to another ethernet port on the ex6200, will i be able to play music with the raspberry pi's upnp?

Any idea if that will work?

And does the ex6200 by itself have any upnp capability?

Appreciate the feedback.