Just saw this ad, think is better deal than harvey norman if you don't mind using USB 2.0.
Description as follow:
Solid. Ready whenever you are. With the dependable speed of USB 2.0. When you need pure storage muscle, choose a drive that makes backing up your life a little easier. Because nothing should ever get in the way of your memories, movies, music and entertainment. Backed by Hitachi’s reputation for quality, reliability and a world-renowned R&D heritage for advanced hard disk drives used to store, preserve and manage the world’s most valued data.
Interface: USB 2.0
Form Factor: 3.5-inch External Hard Disk Drive
Available capacities: 500GB, 1TB & 2TB Includes Hitachi Local Backup(TM) software
System Requirements:
Windows®
Available USB 2.0 / 1.1 port
OS: Windows 7 / Vista / XP
Macintosh®
Available USB 2.0 / 1.1 port
OS: Built for Mac OS X 10.3 or newer
Same price at Umart. Not a bargain.