This! +1. Hopefully, the weaknees "fix" will lead to a way to do it with one internal drive (provided that JMFS, or a future update, will allow me to transfer everything, and then expand beyond the original expansion). Only TiVo HDs, last I knew of. Even then, all of them need to be modded, or problems arise when trying to transfer between modded and non-modded. I only have one active TiVo HD at this time, anyway. I'm not up-to-date enough on the subject to even guess if there could be transfers between HDs and Premieres when mods get thrown in. Since the Premiere is still in its infancy, and will likely require many updates to be what it should have been at launch, I shudder at the thought of modding them, even if that is now possible. Since they are all lifetime subs, I don't want to lose my investment with the slip of a soldering iron, or with a TiVo software update. I'm aware of the deal. I'm always searching the giant database known as the world-wide-web.