Hi My first post. I have searched but did not find any answer to my question, so here I go. I bought the Transformer and the docking station and I'm very happy with it. Instead of buying a $50+ 32Gb SD card or USB key, what if I get a WD Digital Passport for $69 ? How should it be formatted to work with my Transformer ? Or, would it not work at all ? Thanks for your input.