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Purple Surveillance Hard Drive Disk 3.5 Inch Wd30ezaz Wd30ezrz Wd40ezax Wd40ezaz HDD. Large Storage Capacity: 4TB capacity for storing massive files, media, and archives. CMR Technology: Ensures reliable performance and durability for long-term use. Fast Data Transfer: SATA 3.0 interface with 6Gb/s rate for rapid file access. Low Power Consumption: Optimized power usage ensures cooler and quieter operation. Broad Compatibility: Integrates smoothly with servers, workstations, and NAS devices. Industrial Stability: Robust build quality defends against shocks and vibrations. 2-Year Warranty: Backed by Western Digital's trusted 2-year limited warranty. 5400 RPM Speed: Optimized rotation speed for daily office and home tasks.