Originally Posted by RusRus
How large or what size should my truncated copy of my Tivo HD be?
The smallest one I've got is about 320MB.
That's a 648 with everything cleared and deleted so that it starts in Guided Setup.
The largest is about 550MB.
That's a 652 that's already set up for my ZIP code, cable company, OTA channels, etc.
If I had digital cable it'd probably be more, and if I had a bunch of season passes or thumb settings it'd probably be more.
If you wanted to do both the .bak and .tbk versions, I wouldn't count on both fitting on a cd-r.