A pebibyte (peta binary byte, abbreviated PiB) is a large unit of measurement of bytes (computer memory). 1 pebibyte = 250 bytes = 1,125,899,906,842,624 bytes = 1,024 tebibytes. It is related to the petabyte which is 1015 bytes.
1024 pebibytes make one exbibyte.
Percentage difference between decimal and binary interpretations of the unit prefixes grows with increasing storage size