When I resubscribed to dish I was told the ehd I used on my 722 receiver would work on the hopper but when I plug it in it prompts to format the hard drive, is the formatting from the 722 incompatible with the hopper?
I recently moved from a VIP722 and a VIP722K to a Hopper 3. Both VIP722's had an EHD on them and both worked just fine when I plugged them into the Hopper 3 - shows that I had copied to them were still them and was able to watch them.
when you "resubscribed"? If your service was disconnected you would have changed account numbers & the old EHD will only work with the same account number it used previously. If you still have the same account & only changed receivers it should still work. I still have recordings made on a 722 (more than 5 years ago) working on a Hopper 3.