Want a glossy mother ship for your FreeAgent Go drives? Seagate has the answer. Simply slide your portable drive into the Theater’s topside dock. Like the WD TV, it automatically marshals your media collection into categories by type of file. Unlike the WD TV, though, this unit hit some compatibility snags once they arrived: It wouldn’t play any flavor of AAC music file. Equally disheartening is the lack of HDMI and optical audio.