I have an approximately 4 year old Motorola HDTV DVD through Comcast. I think the HDD is getting a little shaky (and pretty full) and wanted to upgrade to a new, larger box, but not lose all my old recordings. Comcast says there is no way to do this, and from what I've read, you can add storage to an existing box via an external drive, but that drive cannot be used for any box other that the box it was formatted for, i.e., not for moving content from one box to another. Is there a workaround for this? I have a whole bunch of shows I don't want to lose if I have to switch boxes.