When you buy a PC it usually includes a hard disk that seems big enough to last forever, but with applications getting larger and web sites offering entertaining
- but hefty - video downloads the chances are that one day it'll begin to run out of space. Carefully pruning some unwanted files can ease the problem temporarily, but the only long-term answer is to add another hard disk, whether externally or inside the PC case. Fortunately, this is cheap and easy to do.

In this article we'll explain about the various types of hard disk that are available, talk through the pros and cons of each one and demonstrate how to install a second disk inside a desktop PC. We'll also explain how to remove the hard disk from an old PC that you want to sell or dispose of and use it as extra storage for your new computer.