When a Minus is a Plus #edtech

Tonight's utility is called Minus.  This site provides you with 10 free Gbs of storage space and works similarly to drop box.  There is a drag and drop interface, desktop utilities and even clients for your smart phone.  The plus of Minus?  For each friend who signs up on your recommendation, you get an extra Gb of space (as does your friend). Another plus? Minus is social and you can follow your friends uploads.  There's even a screenshot component.  Who couldn't use a little extra space?!