Advertisements Tivo is sending me an exchange unit for my S3 that died over the weekend (bad power supply, I think). I have a 750GB drive in it and will put the original drive back in. Questions: Do I need to call Comcast to set up an appointment to reinstall Cablecards in new unit? Should I just use a eSata enclosure for my 750GB and attach it to the new one? I have the space to do so. I can't get my recordings back on my 750GB and view them in my new one, right? Thanks!