A gigabyte (GB) is a unit of digital information storage equal to approximately one billion bytes (technically 1,073,741,824 bytes in binary computing). Storage capacities and data sizes are commonly measured in gigabytes: a typical smartphone might have 64-256 GB of storage, a photo might be 2-5 MB (thousands of photos per gigabyte), and a high-definition movie might be 4-8 GB. Internet data usage is also measured in gigabytes—monthly data plans might include 10-100 GB depending on the plan. Understanding data sizes helps citizens evaluate storage needs, internet plan adequacy, and download times. For government IT systems, storage requirements in terabytes (1,000 GB) or petabytes (1,000,000 GB) represent significant infrastructure investments. Data storage costs have decreased dramatically over decades, enabling digital government services that would have been prohibitively expensive previously.