While most Android and Windows Phone devices act like external drives when connected to a computer with a USB-cable, transferring photos and files to and from an iOS device is a little more tricky. This is where the iStick, a Kickstarter project comes in. iStick is a USB-drive with an integrated Apple Lightning connector, making it compatible with more recent iPhone, iPad and iPod generations.
News: Digital Photography Review (dpreview.com)