The external hard disk drive market is incredibly hot right now, but it’s also ultra-competitive. The latest trend is dockable multi-function drives that are friendlier to use and offer advanced features like video playback. Most docks rely on USB 2.0, but Seagate just dropped a bomb on the industry with a simple twist: They moved the intelligence outside the case, repackaging the standard internal SATA connector as GoFlex, an external link to a variety of docks and adapters.