The Western Digital WD Purple Pro (WD142PURP) is a 3.5-inch hard drive specifically engineered for high-capacity surveillance systems. With 14 TB of storage, it handles the demanding requirements of modern security setups, supporting up to 64 HD camera streams and 32 AI streams simultaneously. This capability is powered by AllFrame AI technology, which improves the quality of video playback and recording, while OptiNAND and WDDA analytics help maintain system health and performance. Under the hood, the drive operates at 7200 RPM with a 512 MB cache and a SATA 6Gb/s interface, allowing for a maximum sustained transfer rate of 255 MB/s. It utilizes CMR recording technology to ensure data reliability and is built to withstand a heavy workload of up to 550 TB per year. Weighing 690 g and measuring 147mm x 101.6mm x 26.1mm, it fits into standard server and NVR chassis, operating reliably in temperatures ranging from 0°C to 65°C. This drive is a dependable choice for professionals managing large-scale surveillance networks where constant uptime and high-resolution data retention are essential.