The WD Red Pro WD4005FFBX is a high-performance internal hard drive designed specifically for 24/7 multi-user commercial and enterprise NAS environments. With a capacity of 4TB, a SATA 6Gb/s interface, and a spindle speed of 7200 RPM, this drive is engineered to handle high-intensity workloads, ensuring reliable data storage, sharing, and collaboration in multi-bay RAID-optimized systems. It features advanced technologies such as NASware 3.0, 3D Active Balance Plus, and a robust error recovery control, making it an ideal choice for businesses that require dependable performance and scalability.