WD Caviar Blue WD5000AZLX 500GB SATA 6Gb/s Internal 3.5-inch Desktop Hard Drive WD Caviar Blue hard drives are available with SATA 6 Gb/s interface built to deliver rock solid performance and ultra-cool and quiet operation. With capacities ranging from 250 GB to 1 TB, these drives are the perfect solution for family and business computing.