. 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 videos 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\'s a WD Blue hard drive that\'s just right for you. And because it\'s from WD you\'ll have the confidence in knowing you\'ve selected a drive that\'s truly world-class..