A Gigabyte is a unit of measuring digital data as a multiple of the byte. This unit is the close equivalent of one billion bytes and is symbolizes as GB.
The naming convention is taken from the Base 10 definition where 1 MB = 1,000,000,000 bytes. When dealing with computer data and memory the more precise Base 2 definition is usually used where 1 GB = 1,073,741,824 bytes (= 1024 MB).
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