Wishlist Quick view WESTERN DIGITAL WD Purple WD40PURX 4TB Intellipower SATA 6Gb/s 3.5" Surveillance HDD $244.96 $168.94 WESTERN DIGITAL WD40PURX WD PURPLE 4TB 7200RPM (INTELLIPOWER) SATA-6GBPS 64MB BUFFER 3.5INCH INTERNAL SURVEILLANCE HARD DISK DRIVE. NEW WITH STANDARD MFG WARRANTY. IN STOCK. Compare Add to Cart Add to Wishlist