Copyright
ÿ More than 300TB of print material each year (books,
journals, newspapers, magazines)
ÿ More than 25TB of Movies each year
ÿ About 375,000TB of Photography each year
ÿ About 987TB of Radio each year
ÿ About 8,000TB of TV each year
ÿ More than 58TB of Audio CDs each year
 …and that doesn’t include software (say, video games)
Or materials born-digital on the Web, etc…

(from “How Much Information? 2003,” Peter Lyman & Hal Varian)