A petabyte according to Mozy.com
[...] for example, uses more than 1 petabyte of storage space to manage its users’ 40 billion photos. (A petabyte is about 1,000 times as large as a terabyte, and is equivalent to about 500 billion pages of [...]
BMC Bioinformatics
[...] for example, uses more than 1 petabyte of storage space to manage its users’ 40 billion photos. (A petabyte is about 1,000 times as large as a terabyte, and is equivalent to about 500 billion pages of [...]