WD Blue hard drives deliver solid performance and reliability while providing you with all the space you need to hold an enormous amount of photos, video, and files. These drives are designed for use as primary drives in notebooks, external enclosures and for certain industrial applications. With a wide array of capacities, cache sizes, and interfaces means there is a WD Blue hard drive that is just right for you. And because it is from WD, you will have the confidence in knowing you have selected a drive that is truly world-class.