The Western Digital WD Purple Pro (WD221PURP) is a high-capacity hard drive specifically engineered for AI-enabled video recording and analytics servers. With a massive 22 TB of storage, it handles the demanding requirements of modern surveillance systems, supporting up to 64 single-stream cameras simultaneously. The drive utilizes Conventional Magnetic Recording (CMR) technology and a 7200 RPM rotational speed to achieve transfer rates up to 265 MB/s, ensuring that high-resolution footage is written and accessed without bottlenecks. To maintain reliability in professional environments, this 3.5-inch SATA 6 Gb/s drive features a 512 MB cache and a workload rating of 550 TB per year. It integrates AllFrame AI technology to improve the quality of video streaming and playback, while OptiNAND and WDDA analytics help optimize performance and monitor drive health. The hardware is built to withstand a wide range of operating temperatures from 0°C to 65°C, making it a dependable choice for security professionals managing large-scale monitoring arrays.