If you are a Bing Rewards member, Microsoft has just launched a nice offer where anyone signed onto that program can get 100GB of free cloud storage space via OneDrive. The extra amount of space will last for two years before it expires.
Bing Rewards offers US users of Microsoft's search service a way to collect points the more they access Bing, which they can exchange for things like e-gift cards and other rewards. However, in the case of the 100GB of extra space on OneDrive, Bing Rewards members don't need to spend any of their points; it's completely free.
Bing Rewards is only available for US residents (sorry, rest of the world) and the offer of 100GB of extra OneDrive space must be redeemed by Feb. 28.
Source: Bing Rewards; Thanks to Agent-P for the tip!