Other
Karbos Guide: Illustrated Guide to Hard Drives
Use this site to learn about hard discs at this easily understood site. It is full of illustrations and charts that are very beneficial.
National High Magnetic Field Laboratory
Magnet Academy: Giant Magnetoresistance: The Really Big Idea Behind a Very Tiny Tool
This itsy-bitsy phenomenon makes your iPod and hard drive tick.
PC Technology Guide
The Pc Tech Guide: Removable Storage
Information about removable computer storage. Includes floppy disk, optical drives, magnetic disk technology, magneto-optical technology, and much more.
Other
Linux Usb: Mass Storage Devices
This site from Linux USB contains brief, but factual information on mass storage devices for computers. Somewhat hard to understand without a prior background knowledge.
Other
American Institute of Physics: Proton Transistor Memory
Describes a new use for hydrogen ions (protons, of course). Shows that protons are not just old hat.