I've been looking for an answer to this to no avail.
I have a Hopper3 and recently put a Wally in service (with a Tailgater). I connected an EHD to the Wally and called to pay the $40 to add the DVR feature to it. Drive formatted fine and I am able to record to it.
I unplugged the EHD from the Wally and connected it to the Hopper3 and it wants to reformat it.
So my question is: is it possible to move an EHD between a Hopper3 and a Wally? I'd like to do this to watch shows on the Wally that were originally recorded on the Hopper3.