For those of you who won't bother to read it all, how about this little factoid?
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Quote from above site:
According to a 2003 report from UC Berkeley's School of Information Management and Systems, 5 exabytes of new information -- the equivalent 37,000 new libraries the size of the Library of Congress or about 30 feet of books for each of the 6.3 billion people on earth -- was created and stored in 2002.