WD Purple Surveillance Storage offers exclusive AllFrame technology to bring you premium reliability and peace-of-mind when installing your home or small to medium business security system. WD Purple exclusive firmware upgrades work with ATA streaming to reduce error pixelation and video interruptions that occur when desktop hard drives are incorrectly used as storage in security systems. WD Purple Surveillance Storage is built for 24/7, always-on, high-definition surveillance security systems that use up to eight hard drives and up to 32 cameras. Model Number: WD60PURX Storage Device Use: Internal Laptop Drive Type: HDD Drive Interface Type: SATA 3 Compatible operating systems: Windows Brand: Western Digital Storage Capacity: 6 TB.