I sent back the Iomega drive to Amazon and got a replacement, same model type. This one worked first time and the available memory went from about 50% to 6% right away. We recorded a couple of programs, one in HD and one in standard, and both have an annoying habit of occasionally freezing up, pixilating, then continuing on playback. If you then rewind a bit and replay, the second time is fine. This will wreak havoc with anything we want to dub over to DVDs.
Does anyone have any experience with this?