I have the Synology D145+ NAS with 4-2TB Samsung SSDD's in it. The first two are active drives for storage, the second two are there to back up the first two. Solid gear, easy to set up, reliable, no issues whatsoever. The NAS feeds my music server via ethernet (they are on the same hardwired network) and the music server feeds the DAC via USB. Those are good electronic connections and none of that setup relies on any sound cards. It's just pure digital files to the DAC.