does the airport extreme have a place to put CDs?

Hi - you can use the USB port for an external hard drive or a compatible printer - you can also use a LAN port for a network hard drive - but I am sorry that I have not done this myself so someone else would have to have to advise you on how to set this up

This might also help - see today's post by Bob Timmons about 4TB hard drives - and check out this support page - http://support.apple.com/kb/HT1331