Looks like eSATA port is enabled for Tivo HD w/ the latest software update (8.1.7c2-01-2-652) There is no easy kickstart method or easy plug and play method found as of yet. So you will have to use mfstools (Mfslive Linux Boot CD) or WinMFS. Screenshot is here. Connect both internal and eSATA drive to your computer: For WinMFS, use mfscopy (answer "yes" at the end), restore(answer "yes" at the end) or mfsadd and will take care of it. For mfstools, mfsadd -x -r 4 /dev/sda /dev/sdb (notice there is no "e" that was required for Tivo S3) /dev/sda is your internal drive, dev/sdb is your eSATA drive. If you don't have a Tivo HD (TCD652160), go out and get one ASAP b/c you are missing out.