By 2010, it looks like Seagate is aiming for 300 terabyte hard drives for your systems!
PLATTER SPINNER Seagate thinks that it will be able to create a 300 TB hard-drive by 2010.

According to Joystick, Seagate boffins are apparently working on a hard-drive which uses heat-assisted magnetic recording (HAMR) techniques.

The boffins think that this will mean that they can shove 50TB of data into a single square inch of drive space, or around 300TB of information on a standard 3.5-inch drive.

This means that you can stuff the entire Library of Congress onto your hard-drive without any compression.