What files can MBL DUO 6TB Play natively

i mean play natively, not just stream to a device. can it even do that? i read that it had a media server of some kind. any ideas? my toshiba tv can play music and photo files from the duo but refuses to play any video files.

It doesn’t PLAY anything at all.  It’s not a media player.  It is a fileserver with media server software.