They could be talking as a percentage of accessible data? Although, that seems like a difficult thing to calculate. EDIT: Seems like a few people have tried, s

They could be talking as a percentage of accessible data? Although, that seems like a difficult thing to calculate. EDIT: Seems like a few people have tried, so they could just take those numbers. For example: "5 billion gigabytes" - WiseGeek 2011 - http://www.wisegeek.com/how-big-is-the-internet.htm http://www.wisegeek.com/how-big-is-the-internet.htm According to Megaupload, they store over 100 petabytes of data. Which equals 102m GB - http://megaupload.com/?c=faq http://megaupload.com/?c=faq That would put them at roughly 2%. EDIT 2: Alternatively, google has them at about 1.8% reach - https://www.google.com/adplanner/planning/site_profile#siteDetails?identifier=megaupload.com https://www.google.com/adplanner/planning/site_profile#siteD...