I saw these sentences on Wikipedia:
Nearly all of the roughly 50 petabytes (a petabyte is 1,024 terabytes) of data available on the Internet were first captured and created by human beings—by typing, pressing a record button, taking a digital picture or scanning a bar code.
Is that correct?
If we suppose that just a DVD movie is at least 4.7 GB, I think it should much more than 50 petabyte.