It is a smart idea to create a backup of your operating system in case the original DVDs ever are lost, broken or damaged. Unfortunately at more than 7GB, OS X Leopard will not fit on a single-layer DVD. If you do not have a dual-layer DVD burner, you can still create a DVD backup. However, you will need to remove some of the unnecessary files that take up space, such as the additional language packs and printer drivers.
