My issue is a bit different, all three of my drives are WD, external drives with their own plug in power. All have worked flawlessly for over a year, I leave 2 plugged in all the time. These drives ARE RECOGNIZED by the hopper, when you plug them in you immediately get the message and they show up in the DVR menu, but when you click on the external drive it switches to them but no content showing. It is reading the drive as it showing the percent full accurately of the drives. This broke overnight and Dish is no help. I have another drive never been used by the Hopper, I plug it in and it says it needs to formatted which is correct it does, I say yes and it appears to be formatting and shows complete, when you plug it back in it say it needs to be formatted again. Basically EHD is now a dead feature. Going to make them replace the receiver and see what happens.