The Western Digital 4TB Red Pro NAS (WD4005FFBX) is designed for medium to large business NAS environments. With a 7200RPM speed, 256MB cache, and SATA 6Gb/s interface, it delivers fast, reliable performance for multi-user workloads. Optimised for NAS systems with up to 24 bays, it ensures durability, reduced downtime, and long-term data protection—backed by a 5-year limited warranty.