Frist of all, welcome to the fourm. That's a fine drive and the best enclosure solution. However I hate to be the Grinch, but if you'd read the very first post on this thread (see #4), you'd find that the only drive that will work via P&P with the TiVo HD is the TiVo "approved device"; the WD My DVR Expander. If you want to use anything other than that as an expansion device you'll need to remove and format the internal HDD. Information on how to do that is also in the first post. It’s fairly simple if you’re comfortable with connecting both drives to your P.C. and doing a little work. IMHO if you’re going to remove the internal drive, you might as well upgrade/replace it with your 1TB drive and save the existing drive as a backup (unless you really need the additional bit of space). Once it’s done it’ll be a nice Christmas present.