What is "zettabyte"

n. (context computing English) One sextillion (10²¹) bytes. SI symbol: ZB.

The zettabyte is a multiple of the unit byte for digital information. The prefix zetta indicates multiplication by the seventh power of 1000 or 10 in the International System of Units (SI). A zettabyte is one sextillion (one long scale trilliard) bytes. The unit symbol is ZB.

A related unit, the zebibyte (ZiB), using a binary prefix, is equal to .