Edit 4/1/2016EHD issue update. Received cables and connected one of them between the H3 and the external drive. Nothing happened. Called Dish Tech Support, trouble shooted all three USB ports, nothing. Dish sent a reset signal to my hopper. Now the external hard drive activity indicator blinking like crazy. No pop ups that the hopper recognizes that the drive is attached. Dish tech sent trouble ticket to support team about this issue and to get a ETA for a fix to be put out. I was told that employees at Dish had given the equipment a test run before release to the public. This particular event was not tested though. I was told to followup in about a week. I am hopeful but not totally optimistic a solution will be found short of reformatting the drive. I am still being told that the drive as formated for my H2 will not need to be formatted again.
I have let the H3 settle in as advised. The EHD is still not recognized.