The right drive for the job WD Purple drives have been specifically designed for the extreme demands of 24/7 video surveillance systems that reach high temperatures. Performance you can rely on Built by a world leader in the storage industry, WD Purple is designed for the playback of high-quality video when you need it most. Expand your view up to 64 cameras They are optimized to support up to 64 cameras, giving you the flexibility to upgrade and expand your security system in the future. A FLAWLESS INTEGRATION Support for a wide range of industry-leading devices and chipsets ensures you re sure to find the configuration and support that fits your NVR. LESS IS MORE Low power consumption is crucial in a permanently operating, high-temperature video surveillance environment. IntelliSeek technology helps reduce vibration and environmental noise.