wiki isnt bad, or if you have the option take a class in digital circuitry or digital logic, similar class... they will teach you how storage devices work and hows bits of info are stored and stuff like that, its interesting stuff...or if you want to learn about transistors and such take a general electronics class.
im going for my EE at drexel so I am learning about that little by little, I know my digital logic and basic stuff like that pretty good since I am only a Pre-Junior (5 year program)