4 gigabytes (GB) is a unit of digital information storage. It is commonly used to measure the size of files, applications, and storage devices like USB drives and hard drives. One gigabyte is equal to 1,024 megabytes (MB), so 4 GB is equivalent to 4,096 MB. This amount of storage can hold approximately 1,000 songs, 2,000 photos, or several hours of video, depending on the file quality. In computing, 4 gigabytes is often considered a minimum amount of memory for running modern operating systems and applications smoothly. Many smartphones and tablets also come with 4 GB of RAM, which helps them perform tasks efficiently. As technology advances, larger storage capacities are becoming more common, but 4 GB remains a useful benchmark for basic needs.