Petabyte (1 000 000 000 000 000 bytes) 1  1 Petabyte: 5 years of EOS data (at 46 mbps) 2  2 Petabytes: All US academic research libraries. 3  20 Petabytes: Production of hard-disk drives in 1995. 4  200 Petabytes: All printed material OR Production of digital magnetic tape in 1995.