I lurk daily scouting for good deals, so my very first deal (be kind lol) ....
WD My Passport Ultra 1TB USB 3.0 Portable Drive with Auto and Cloud Backup, cheapest on sale I can find, £70.00 @ currys.
The ultra range which I believe is there top range of the WD portable drives.
Black, Blue, Red (cheapest at £51.98) and Grey.
2TB are also priced at 79.99.