Hi, I don't know if this thread is still live, or if anyone is still checking it, but, you can't transfer media you've recorded with a Dish Network DVR to any sort of external drive and then expect to be able to plug that same EHD in to a computer or directly in to the side of a TV or whatever and be able to watch it. Dish Network PVRs send the media content to the drive in an encrypted format, and only the Dish PVR itself can decrypt it for playback. This is to guard against video piracy.
Let me know if I misunderstood the question.