Are you looking for a device to store the music, or a device that can connect to a hard drive and show what's playing, what's in the hard drive, etc? Is this gui needed for a hand-held device, or a TV? If it's going to be controlled and viewed on a hand-held, any of the streaming boxes will work (Sonos, MusicCast, HEOS, etc). I'm looking for a good way to replace a Request server (company changed hands, bad communication, it's ten years old and not supported...), so I copied some music from the Request to a thumb drive and stuck it in the USB port of my MusicCast- doesn't need any kind of music player and in fact, it doesn't work if one resides on the drive. In the case of the Request I located the music files, right clicked on the folders and copied them before pasting. If cover artwork was associated with the file, it shows up on my iPhone.

In the case of the Request, the cover art was found by the server program, but it saves the files with this. If you use iTunes and save the music as .wav files, it should work the same way since they can be copied to WMP or other music
players.

If the RTi is old, why not look at one of their IP controlled hubs?