WD WD40EFZZ | 4TB | SATA 6Gb/s | 5400RPM | 128MB | 3.5" NAS Hard Drive WD WD40EFZZ | 4TB | SATA 6Gb/s | 5400RPM | 128MB | 3.5" NAS Hard Drive
WD WD40EFZZ | 4TB | SATA 6Gb/s | 5400RPM | 128MB | 3.5" NAS Hard Drive

Western Digital

Western Digital WD40EFZZ | 4TB | SATA 6Gb/s | 5400RPM | 128MB | 3.5" NAS Hard Drive

$229.95

Brand New, Factory Sealed | In Stock | Bulk Orders Available

The WD40EFZZ is a 4TB WD Red Plus NAS hard drive featuring a SATA 6Gb/s interface, 5400RPM class rotation, 128MB cache, and CMR recording in a 3.5-inch form factor. Built for 24/7 always-on NAS operation, it is ideal for small-to-medium business file sharing, RAID array rebuilds on ZFS and other file systems, and multi-bay NAS archiving. Compatible with Synology, QNAP, TrueNAS, and other NAS enclosures supporting up to 8 drive bays. NASware firmware with Time-Limited Error Recovery (TLER) and Rotation Vibration sensors delivers reliable operation and up to a 180TB/yr workload rating backed by a full manufacturer warranty.

All products are sold as new in original retail or OEM packaging unless otherwise specified. Same-business-day shipping on orders placed before 2 PM PT. Bulk inquiries welcome.
Specifications
  • Manufacturer: Western Digital
  • Model: WD40EFZZ (WD Red Plus)
  • Capacity: 4TB
  • Interface: SATA 6Gb/s
  • RPM: 5400 class
  • Cache: 128MB
  • Form Factor: 3.5-inch
  • Recording: CMR
  • Sustained Transfer: Up to 180 MB/s
  • Workload Rating: 180TB/yr
  • MTBF: 1 million hours
  • Load/Unload Cycles: 600,000
  • Warranty: 3-year limited manufacturer warranty
Product Features
  • NASware firmware for NAS compatibility
  • CMR recording for consistent RAID rebuilds
  • Time-Limited Error Recovery (TLER) for RAID stability
  • Rotation Vibration (RV) sensors for multi-bay reliability
  • Dual-plane balance control technology
  • 180TB/yr workload rating for 24/7 duty
Compatibility
  • Synology DiskStation / RackStation
  • QNAP multi-bay NAS
  • TrueNAS / unRAID builds
  • Asustor and Terramaster NAS enclosures
  • Any SATA 6Gb/s controller or NAS with up to 8 drive bays
Shipping & Returns
  • Free Shipping: We currently offer free Economy Shipping within the continental U.S. with no minimum order required. Expedited shipping is available at standard carrier rates.
  • Same-Day Shipping: Order placed before 2PM PST will ship the same day. Orders received after this time will ship the following business day.
  • Hassle-Free Returns: If you're not completely satisfied with your purchase, simply return it within 10 days for a hassle-free refund or exchange.

4TB SATA 6Gb/s 5400RPM 128MB Cache CMR 3-Year Warranty

WD Red Plus 4TB — CMR NAS reliability

The WD40EFZZ is Western Digital's 4TB WD Red Plus NAS drive, engineered for 24/7 file sharing and archiving in mainstream RAID-optimized NAS systems. CMR recording, NASware firmware, and a 180TB/yr workload rating make it a dependable building block for up to 8-bay enclosures.

4TB NAS Capacity

Four terabytes per bay in a 3.5-inch form factor with transfer speeds up to 180 MB/s for multi-bay NAS systems.

CMR Consistency

Conventional magnetic recording sustains predictable write performance and clean RAID array rebuilds on ZFS and other file systems.

24/7 NAS Reliability

180TB/yr workload rating, 1 million hours MTBF, and 600,000 load/unload cycles for always-on operation with TLER and RV sensors.

Broad NAS Support

NASware firmware is extensively tested for Synology, QNAP, TrueNAS, and other enclosures supporting up to 8 drive bays.

Full Manufacturer Warranty

Brand new and factory sealed with a 3-year limited full manufacturer warranty and same-business-day shipping before 2 PM PT.

Frequently Asked Questions

Frequently asked questions for SATA, including information on usage, configuration, and compatibility.

1. Are these items brand new?

Unless otherwise clearly stated in the product listing, all items sold by Anand International Inc. are brand new and factory sealed. Where applicable, listings will clearly indicate if an item is used, refurbished, or factory recertified, and will describe the condition in detail.
2. Is this drive compatible with my NAS enclosure?

This drive is compatible with most major NAS brands including Synology, QNAP, Western Digital, and Seagate NAS enclosures. We recommend verifying against your enclosure manufacturer's compatibility list for your specific model.
3. Do you offer bulk or wholesale pricing?

Yes. Contact us directly for volume pricing on orders of 5 or more units. We work with IT departments, resellers, and system integrators.
4. What warranty is included?

All items sold by Anand International Inc. are brand new and factory sealed unless otherwise stated. Most carry the manufacturer's original warranty. In cases where we source factory OEM product without a manufacturer warranty, we provide a direct 90 day warranty through Anand International Inc. covering defects in materials and workmanship.
5. How is this item shipped?

All items are shipped in anti-static packaging with appropriate cushioning to prevent damage in transit. Most orders ship within 1–2 business days.