The 622 and 722 drives can be used between any 622/722/Hopper on the same account. The 211 drive is a different format and could only be used with another 211.
SO when I switched from 622 to Hopper they said I would be able to transfer my saved files, however it keeps telling me it needs to format the EHD. I have a 2TB Seagate expansion drive. Tech support has now told me that it needs to have its own power supply to work? Any help would be appreciated and help keep my wife happy.