Yobibyte
The yobibyte (YiB) is a multiple of the unit byte for digital information in other words a yobibyte (YiB) is a digital information storage unit used to indicate the size of data.
A yobibyte is a unit of data storage that equals 2 to the 80th power, or 1,208,925,819,614,629,174,706,176 bytes.
A yobibyte is 1,024 zebibytes and is the largest unit of measurement.
So, a yottabyte equals to 1 million exabytes.