It is estimated that a map of all the synaptic connections within just a cubic millimeter of human brain tissue could fill a petabyte of storage.

Tracing the human brain’s connections.

A petabyte is roughly equivalent in informational terms to 13.3 years of HDTV content, or 58,292 movies. One petabyte could also approximately fill 20 million four-drawer filing cabinets full of text.