We have two 722K receivers & the one my sons use is acting like the HD is failing. When playing recorded shows the video frequently freezes although the audio will continue. We tried a hard reset several times & it only improves for a short while. We do not currently have external hard drive service activated, but I do have a 500 GB hard drive I can put in an enclosure with USB 2 to transfer the recording to. I don't think we'd use an EHD much, neither receiver ever gets too full, so I'm debating on the expense. I'm not sure how much they have on the hard drive, but it does say there are about 10 hours of HD space left. How long would it take to transfer the recordings?