Ronin is not correct. The idea of using aluminum foil is just great. The only caution there, is to not use the foil for things like motherboards, that have a bios battery on board. This, of course, is not the case with most computer cards, or hard drives. The main risk for hard drives is head damage due to dropping them.
Bubble wrap is fine.
Actually just careful handling is OK too. I stack them up in my closet at work with no bags whatsover. Never a problem. Thanks for the help. I did not know hard drives were not prone to static discharge as much as some other computer components.