Yottabyte

multiple of the unit byte, equivalent to 1,000 zettabytes

A yottabyte (YB) is the biggest unit of measurement for computers of the near future. One yottabyte holds 1000 zettabytes (ZB) or a septillion (1,000,000,000,000,000,000,000,000) bytes. 1000 yottabytes make up 1 ronnabyte.