We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Bare 3.5-inch SATA hard drive, silver metal casing with green label

Western Digital

Western Digital WD40PURX 4TB 3.5" SATA 5400 RPM 64MB internal hard drive

SKU CH-T2FF-TA699 MPN WD40PURX

4 TB surveillance drive rated for 180 TB yearly workload with 64 MB cache and 5400 RPM SATA 6.0 Gb/s interface

  • PackagingBare Drive
  • InterfaceSATA 6.0Gb/s
  • Capacity4TB
  • RPM5400 RPM
  • Cache64MB
  • FeaturesEngineered specifically for surveillance security systems. T

Options 4TB

  • Engineered for surveillance security systems
  • Supports up to 180TB/year workload rate
  • Tuned for write-intensive, high stream-count applications
  • Prioritised write operations for surveillance performance
  • TLER and ATA streaming support included

Surveillance storage drive

The Western Digital WD40PURX is a 4TB 3.5 inch internal hard drive built for surveillance security systems. It connects via a SATA 6.0Gb/s interface and operates at 5400 RPM with a 64MB cache. The firmware prioritises write operations to sustain high stream counts from multiple cameras.

Suited for NVR appliances and DVR arrays

This drive supports workloads up to 180TB per year and handles more than eight bays in a single enclosure. TLER and ATA streaming support help maintain continuous recording without frame loss. It is not intended for general desktop workloads, boot drives or workloads that demand low-latency random reads.

Workload rating decides fit

The 180TB yearly workload rating is the specification that determines whether this drive matches the recording volume of the deployment. Buyers who need a higher annual write budget should look at drives rated for heavier surveillance workloads.

Highlights

  • Engineered for surveillance security systems
  • Supports up to 180TB/year workload rate
  • Tuned for write-intensive, high stream-count applications
  • Prioritised write operations for surveillance performance
  • TLER and ATA streaming support included

Specifications

BrandWD
SeriesPurple
ModelWD40PURX
PackagingBare Drive
InterfaceSATA 6.0Gb/s
Capacity4TB
RPM5400 RPM
Cache64MB
FeaturesEngineered specifically for surveillance security systems.
Three times the workload rating of our desktop hard drives.
Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications.
Prioritized write-operations for maximized surveillance performance.
TLER & ATA streaming support.
Support for more than eight bays.
UsageFor Video Surveillance
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.60mm
Length (maximum)147.00mm
Shipping weight0.77 kg
Package size208 × 163 × 110 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I install the WD40PURX in a surveillance NVR and what step is often missed?

Mount the 3.5 inch drive in the bay using four screws, connect the SATA data and power cables, then enable TLER or ATA streaming in the NVR firmware so write operations are prioritised correctly.

What maintenance or replacement should I expect for this surveillance drive?

The drive is rated for 180 TB per year workload; if annual writes approach that limit, plan replacement before the rated workload is exceeded to avoid degraded recording performance.

Which limit appears first under sustained write-heavy surveillance use?

The 180 TB per year workload rating is the first constraint; sustained high-stream recording that exceeds this rate will reduce reliability before mechanical wear becomes a factor.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.