Dubbed the Seagate Duet, the drive's contents are cloned to Amazon Drive. All you need to do is plug in the drive, sign in with your Amazon account and that is it.
You can drag and drop files over, and access them from the web or Amazon's Drive app on smartphones and tablets. Seagate claims you'll get a year of unlimited storage just for buying the hard drive, which normally costs $59.99 annually.
Amazon's listing for the Duet has some fine print. At the moment the offer is for the US and is not valid for current Amazon Drive Unlimited Storage paid subscription customers.
You also have to redeem the promo code within two months of buying the hard drive if you want the year's worth of unlimited cloud storage. Returning the Duet, will see your 12 months of unlimited drive storage slashed down to three.