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. One 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, terabytes are essential for managing large datasets, such as those used in cloud computing, big data analytics, and video streaming services. As technology advances, storage needs continue to grow, leading to the development of even larger units like petabytes and exabytes.