Western Digital WD140EFFX 14TB Red Plus NAS Hard Drive

The Western Digital WD Red Plus WD140EFFX is a 14TB internal hard drive purpose-built for network-attached storage systems in small to medium business and SOHO environments. At its core, it uses Conventional Magnetic Recording (CMR) rather than Shingled Magnetic Recording (SMR), a distinction that matters during sustained write operations and RAID array rebuilds where CMR drives maintain more consistent performance. With a 512MB cache and SATA 6 Gb/s interface, the drive handles sequential data transfers efficiently, while the 5400 RPM spindle speed keeps power consumption and noise levels relatively low — practical benefits for drives that run around the clock.

Western Digital's NASware firmware tunes the drive specifically for NAS enclosures, improving compatibility with popular multi-bay systems and reducing vibration-related issues when multiple drives operate side by side. The WD140EFFX supports up to 8-bay configurations and carries a 180 TB/year workload rating, which covers the sustained read/write demands of file serving, media streaming, and scheduled backups. A 3-year limited warranty backs the drive, and the 3.5-inch form factor fits standard desktop NAS bays without adapters.