zettabyte

A unit of computer memory or data storage capacity equal to 1,024 exabytes (2⁷⁰ bytes).

One sextillion (10²¹) bytes.

Either 1021 or 270 bytes

a unit of information equal to 1024 exbibytes or 2^70 bytes

a unit of information equal to 1000 exabytes or 10^21 bytes