For those looking at the purchase of a desktop computer, one of the key features that you will be presented with is the hard drive size. This is the primary method of data storage for the system and it has exploded in capacity over the past couple of years. How much space does one need? Why does the system have two hard drives but only have the storage space of a single drive? What about a hard drive that is paired up with a small solid state drive? Find out more about these types of questions you will be confronted with in my guide to desktop hard drives.