The Yobibyte is a standards-based binary multiple of the byte, a unit of digital information storage.  The yobibyte unit symbol is YiB.

1 yobibyte = 280 bytes = 1208925819614629174706176bytes = 1024 zebibytes

The yobibyte is closely related to the yottabyte, which is defined as 1024 bytes = 1000000000000000000000000bytes.

The zebi and yobi prefixes were originally not part of the system of binary prefixes, but were added by the International Electrotechnical Commission in August 2005.