This may be useful if you're looking for capacity vs. portability.
Note: Only USB 2.0 and requires external/AC power (i.e. not powered by USB cable).
Also, this is a 'green' drive, and others have reported that "The PCB board is soldered onto the hard drive so you won't be able to rip the hard drive out and place it in other devices". (http://www.ozbargain.com.au/node/78875#comment-1010298)
EDIT: Seems that the drives inside are not welded to the PCB - thanks @foobar!
Manufacturer's product specs are here: http://wdc.com/global/products/specs/?driveID=936&language=1
I caught the headline and it was not making sense- Harvey Norman- good deal. They are usually oxymorons.
Eyes scanned further down- aha- that figures- USB 2.0
They should be paying you to take those antiques off their hands.