Toshiba 2TB portable drives for $84 with Click & Collect and coupon EXTRA15 (thanks Fifam). Availability is very limited however.
Toshiba 2TB Canvio Basic Portable: http://www.dicksmith.com.au/computer-accessories/toshiba-can…
Seagate 2TB Expansion Portable $99: http://www.dicksmith.com.au/usb-hard-drives/seagate-expansio…
Both are showing as out of stock on mobile.