WD Red Plus 4TB NAS Hard Drive, 3.5" SATA 6Gb/s, 5400 RPM, 256MB Cache, CMR (WD40EFPX)

• WD Red Plus NAS hard drive with 4TB of capacity
• 5400 RPM spindle speed with 256MB cache and transfer rates up to 180 MB/s
• CMR recording with NASware firmware for 24/7 NAS and RAID use
• Designed for NAS systems with up to 8 drive bays, rated for 180TB per year
• Model: WD40EFPX | QNAP part number: 72113400-6010200-000-RS

A 4TB WD Red Plus drive supplied by QNAP for home and small-business NAS systems.