Kuner, Christopher, and Fred H. Cate, Christopher Millard, Dan Jerker B. Svantesson. "The Challenge of ‘Big Data’ for Data Protection." International Data Privacy Law, 2012 2: 47-49.
From the paper: "Data protection, like almost everything else in our lives, is challenged by the advent of ‘big data’. The Economist reports in its 2012 Outlook that the quantity of global digital data expanded from 130 exabytes in 2005 to 1,227 in 2010, and is predicted to rise to 7,910 exabytes in 2015... The importance of big data is not just a result of its size or how fast it is growing (about 60 per cent a year), but also the reality that the data come from an amazing array of sources. The Internet captures lots of data. Facebook alone has more than 800 million active users, more than half of whom log in every day, where they generate more than 900 million web pages and upload more than 250 million photos every day." Read more