This is an interesting application. But, your demo video does not do it justice: (a) It is too long; (b) your folders that you use in the video have too many files in them; you say about 10x more words than necessary; and (d) your voice, combined with the bad microphone input, make the explanation sounds pad.

Your main competition is not USB drives: it is HotMail, GMail, and Yahoo! Mail. Once people are taught the "email it to yourself" trick, they love to use it--I think because it is not so intuitive for people, yet it is so simple, that they are proud that they are doing something so clever.