All credit to babyblue for finding this originally (old deal expired at 727 degrees) - now seems to be back in stock!
Buy quick as voucher expires today!
Add the hard drive plus something else for £1.03 or over. This makes the order over £50, and then use code TDX-KMAW for £10 off. Also go through Quidco for 5%. You will get 100 Clubcard points too and free delivery to store.
Product details from Tesco website:
This Hitachi hard drive, with USB 2.0 interface, can easily store and protect up to a terabyte of data. It’s simple to set up – just plug in, switch on and then it’s ready to use. After that it will automatically power on and off with your computer and a cool blue LED shows you when your drive is working for you with a transfer speed of 7200 rpm. The sleek aluminium casing means it looks as good as it works. AC powered to ensure a reliable connection and data transfer.