A terabyte (TB) is a unit of digital information storage that equals 1,024 gigabytes (GB). It is commonly used to measure the capacity of hard drives, solid-state drives, and other storage devices. A terabyte can hold approximately 250,000 photos, 500 hours of HD video, or millions of documents, making it a significant amount of data for personal and business use. In the context of computing, a terabyte is part of a larger hierarchy of data measurement, which includes units like megabyte (MB) and petabyte (PB). As technology advances, the need for larger storage capacities continues to grow, leading to the development of devices that can store multiple terabytes of data.