A gibibyte is a unit of data storage that equals 2 to the 30th power, or 1,073,741,824 bytes.
While a gigabyte can be estimated as 10^9 or 1,000,000,000 bytes, a gibibyte is exactly 1,073,741,824 bytes. This is to avoid the ambiguity associated with the size of gigabytes. A gigibyte is 1,024 mebibytes and precedes the tebibyte unit of measurement