A GigaByte (GB) is a unit of digital information storage that equals 1,024 megabytes. It is commonly used to measure the size of files, storage devices, and memory in computers and smartphones. For example, a typical high-definition movie might take up about 2 to 4 GB of space. In the context of computer hardware, GigaBytes are often associated with the capacity of hard drives, solid-state drives, and RAM. As technology advances, storage capacities continue to increase, with devices now commonly offering several hundred GB or even terabytes (TB) of space, where 1 TB equals 1,024 GB.