Filed under: Home Entertainment, StorageEnterprising Apple TV users have been putting that USB port to good use for ages now, for every hack but the most obvious one: media playback. So far you haven't been able to make a cheap, external USB drive into your primary storage device for kosher Apple TV media, but no longer. The Apple TV Hacks folks have finally figured out a method, and though some Terminal chops and an Intel-based *nix machine (like Mac OS X) are required to run the hack, and it's