You should double-check the instructions you printed out. In the first post you made to this thread a few days ago, it sounded like you followed half the instructions from Preserve Settings Only and half the instructions from Preserves Settings and Recordings. There is no posted set of instructions that involves (a) connecting two drives at the same time and (b) a truncated backup and restore. The FAQ in the first post answers most of these questions. The "plug and play" external drive expansion on a TiVo will not work with an upgraded internal drive. To add an external drive to an upgraded TiVo, you would need to "marry" the two with WinMFS on your computer. You can have internal and external drives up to ~1.1TB each, for ~2.2TB total.