One gigabyte is equal to 1,000 megabytes and precedes the terabyte unit of measurement.Gigabytes, sometimes abbreviated “gigs,” are often used to measure storage capacity. This is a multiple of the unit byte for digital information. The prefix giga means 109 in the International System of Units . Therefore, one GB is 1000000000 bytes. The unit symbol for the gigabyte is GB.
This definition is used in all contexts of science, engineering, business, and many areas of computing, including hard drive, solid state drive, and tape capacities, as well as data transmission speeds. However, the term is also used in some fields of computer science and information technology to denote 1073741824 (10243 or 230) bytes, particularly for sizes of RAM. The use of GB may thus be ambiguous. Hard disk capacities as described and marketed by drive manufacturers using the standard metric definition of the gigabyte, but when a 400-GB drive’s capacity is displayed by, for example, Microsoft Windows, it is reported as 372 GB, using a binary interpretation.
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