Oh I see. Yeah DVD drives generally use the same SATA interface as hard drives.

If you mean a 2.5" drive (laptop sized) then yes you can generally do that. 3.5" drives are usually 1" thick and won’t fit in a slim DVD drive slot.

I just download the mp3 and play it with mplayer. Don’t need no apps.

Nice but 1) doesn’t Kobo use DRM? 2) I had thought selfhosted was about server apps. Calibre is great but it’s a client app. Should this post be in a different group?