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. Exclusive firmware upgrades work with ATA streaming to reduce error pixilation and video interruptions that occur when desktop hard drives are incorrectly used as storage in security systems. WD Surveillance Storage is built for 24/7, always-on, high-definition surveillance systems that use up to eight hard drives and up to 32 cameras.