A recent item from Scientific American caught my attention: it's estimated that the total data currently "on" the Internet is 161 000 000 000 Gigabytes... That's three million times more than all the bits 'n bytes contained in all the books ever written. Wow.
Put another way: say you buy a bunch of 160G hard drives. How many would you need? Start, by tiling an entire rugby field with a layer of drives. That's a lot of drives. Then, stack another 3000 layers over that first one. That's how many you will need.
nothing more to see. please move along.