This is a great deal if you are looking for cloud storage. Sure you have to sign up for Bing Rewards but 100GB of storage for two years is pretty tempting.
To get this mighty generous freebie (which is for US residents only -- sorry, rest of world), you need just one thing: a free Bing Rewards account. With that done, just head to your Bing Rewards dashboard, then click the "100 GB free" link. From there you simply need to agree to receive promotional OneDrive emails -- a small (and common) price to pay for that much space.