Amazon offers the Kingston 64GB Wi-Drive Wireless Flash Drive, model no. WID/64GB-A, for $79.99 with free shipping. That's $1.25/GB and the lowest total price we could find by $35. The Wi-Drive provides an additional 64GB of media storage, via 802.11n connectivity, for an iPhone, iPod touch, iPad, or Android device. It can be shared with up to three devices at once.