I backup my 55 gigs site every week ( file sync) onto a USB 2.0 enclosure with a 100gig 7200 rpm hard drive. It is 40 times faster than USB 1.0 or 1.1 . You can add a USB 2.0 pci card for about $ 20.00.
Much cheaper on the medium and long term run. Also, the fact that it is portable allows you to store it in a different and safe location.
My
