WD - Internal - 500 GB - SATA - 7200 rpm WD Blue drives are designed and manufactured with the proven technology found in WD's original award-winning desktop and mobile hard drives. Built to the highest standards of quality and reliability, these drives offer the features and capacity ideal for your everyday computing needs. These drives are available in a broad range of capacities, cache sizes, form factors and interfaces so you can be sure there's a drive that's the perfect fit for your system, in more ways than one.