What do I do with this Auralic?

I recently and very impulsively purchased a display model of an Auralic Vega G2 (unused but reboxed) in a liquidationsale for $600. Now I have heard of Auralic and that they make great products but I am a novice in digital music. The Vega is easy to setup as a streamer and the DS Lightning control app is great. What is even better is the sound, Tidal and even Spotify sound great. It really is superb (to my old ears anyway).

My problem is I can't figure out how to play all my music stored on my NAS. About all I do know is that my NAS is too old and not powerful enough to play via HS USB. Has anyone on here used one of these and how. I have this thing about Roon and paying $595 or whatever for a licence and even then I still need something to store the music files.

A high spec NAS would work but I am not keen on this as it would need to be in the listening room. Or I could use it as a $600 paperweight!!! Any good ideas please?