A terabyte's a SI-multiple (see prefix tera-) of the unit byte for digital information storage and's equal to 1012 bytes or 1000 gigabytes. The terabyte's abbreviated with the symbol TB. The designation terabyte's rarely used to refer to the tebibyte, its binary prefix analogue, because only recent (since 2007) disk drives reach this capacity. Disk drive sizes are always designated in SI units by manufacturers. However, a possible confusion arises from a conflict between the long-standing tradi… (More on Terabyte)