Three. It's a magical number, you know? Hitachi GST sure feels that way, and the company is today introducing a trio of three terabyte storage solutions. First up is the 3TB Deskstar internal HDD kit, which apparently shatters the 2.2TB capacity limit on 32-bit Windows XP systems without any extra hardware required. For those who've graduated to more modern systems, there's the new 3TB Hitachi XL USB 2.0, an external archive solution designed to be sat horizontally or vertically and operate with both PC and Mac platforms. Lastly, the company is finally shipping the 7K3000 and 5K3000 internal hard drives to OEMs and channel partners, but the 3TB version of the latter won't hit until next quarter. As for pri