WD Red Plus 4TB NAS Hard Disk Drive – 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch – WD40EFRX

**WD Red Plus 4TB NAS HDD (WD40EFRX)**
Optimized for NAS systems, this 3.5-inch drive combines 4TB capacity, 5400 RPM speed, and 64MB cache for reliable, energy-efficient performance. Features CMR technology for sustained data integrity in multi-user environments, ensuring durability under 24/7 workloads. SATA 6Gb/s interface enables seamless integration, while NASware? 3.0 enhances compatibility and error recovery. Ideal for home/small business NAS setups, it reduces vibration and power consumption, backed by a 3-year warranty. Built for stability and long-term data protection in RAID configurations.