WD Red Pro WD4001FFSX 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" NAS Internal Hard Drive (Used)

The Western Digital WD Red Pro WD4001FFSX delivers 4TB of high-performance NAS storage engineered for the demands of always-on RAID and multi-bay NAS environments. Spinning at a full 7200 RPM with a generous 128MB cache and a SATA 6.0Gb/s interface, this is a datacenter-class drive built for sustained throughput and 24/7 reliability — a significant step above consumer-grade storage. At this price point, it represents exceptional value for IT professionals, home lab builders, and small-to-medium businesses that refuse to compromise on storage performance.

Specifications

• Part Number: WD4001FFSX
• Brand: Western Digital
• Series: WD Red Pro
• Capacity: 4TB
• Spindle Speed: 7200 RPM
• Cache: 128MB
• Interface: SATA 6.0Gb/s
• Form Factor: 3.5"
• Designed For: NAS and RAID environments

Condition

This drive is sold in used condition and has passed a rigorous multi-point testing protocol carried out by our professional technicians. It has been thoroughly cleaned and repackaged in custom protective packaging — so it arrives ready to install and perform. Backed by a 90-day warranty for complete peace of mind.

Why Buy From Us

Every used hard drive we ship has cleared our comprehensive multi-point inspection and testing process — no shortcuts, no exceptions. Professional cleaning and industry-leading custom protective packaging ensure your drive arrives in perfect condition. Most orders ship free with 2-day delivery, so your storage upgrade gets where it needs to go fast. The 90-day warranty means you're covered long after the drive is in your rack.