If you were looking for the slimmest external hard drive available on the market – look no further than Seagate’s latest offering. The GoFlex Slim Drive that is available today from Seagate has just earned the title of the world’s slimmest portable external hard disk. With a width of only 9mm, the GoFlex Slim Drive is roughly the width of a pencil. It comes equipped with a 7200RPM drive and a USB 3.0 interface for data transfer at speeds of up to 40mb/s, and is plug-and-play compatible (though it’s hard to find a device that isn’t nowadays). The GoFlex Slim Drive is also compatible between Mac and Windows computers – without any formatting or performance loss, which is good news if you like working with different operating systems. The 320GB version of the drive is available now for only $99.99.