I still have the disappearing drives glitch occasionally, but not as often. The problem I DO have, is that I have to ask it twice to play content off of an external drive. It reads the content, makes a bunch of tiles, and then when I click on the tile, I just get a black screen and it doesn't start the content. I wait a few seconds, go through it again, and it works on the second time, every time.... Is there a way to get it to spin up the drive and recover from the black screen without having to go through multiple key presses a second time?
Did you try unpluging/repluging the EHD/