Two hard drive in one computer?

The normal computer user should always have a primary hard drive and a secondary hard drive. Hard Drive are not designed to last past roughly 7 years and more often then not, they die or become damaged within 5 years of purchase. The 2nd drive should be used as a "backup" to protect your valuable information. The 2nd drive can be "internal" or "external", but it is important to have a drive that saves your critical data/information.