Western Digital WD Purple 4TB Surveillance Hard Disk Drive Desktop Internal HDD IntelliPower RPM SATA 6Gb/s 64MB Cache 3.5-inch WD40PURX

Features: Engineered specifically for surveillance security system. Reduced video frame loss. Optimized to support up to 32 high-definition surveillance cameras Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications. Prioritized write-operations for maximized surveillance performance. TLER ATA streaming support.