From TechRepublic:
Last year, Hitachi Global Storage Technologies predicted hard-drive companies would announce 1 terabyte drives by the end of 2006. Hitachi was only off by a few days.
The company said on Thursday that it will come out with a 3.5-inch-diameter 1 terabyte drive for desktops in the first quarter, then follow up in the second quarter with 3.5-inch terabyte drives for digital video recorders, bundled with software called Audio-Visual Storage Manager for easier retrieval of data, and corporate storage systems…
A terabyte is a trillion bytes, or a million megabytes, or 1,000 gigabytes, as measured by the hard-drive industry. (There are actually two conventions for calculating megabytes, but this is how the drive industry counts it.) As a reference, the print collection in the Library of Congress comes to about 10 terabytes of information, according to the How Much Information study from U.C. Berkeley.