Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX

Western Digital 4TB WD Red NAS Hard Drive (WD40EFAX) is engineered for NAS systems with up to 8 bays, delivering reliable 24/7 performance for personal and home office storage solutions. Featuring a 5400 RPM speed, 256MB cache, and SATA 6Gb/s interface, it ensures smooth data transfers and optimized RAID compatibility. NASware firmware enhances system reliability and reduces downtime, while its 180TB/year workload rating makes it ideal for file sharing, backups, and multimedia storage. Built for energy efficiency and durability, this drive is perfect for home and small business NAS setups.