Western Digital WD Purple Surveillance Internal Hard Drive (3.5 inch)

Capacity

Price

$250.92

Per TB$41.82

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Reasons to buy

  • Positioned for 24/7 video recording rather than intermittent desktop use.
  • Published up to 180 TB per year workload rating on official WD Purple SATA datasheet models.
  • CMR recording on the WD Purple SATA SKUs listed in the current Western Digital datasheet table.
  • AllFrame technology is included to reduce frame loss in supported surveillance stacks.
  • Many 3 TB and larger SKUs support up to 16 drive bays per Western Digital footnotes.

Reasons to avoid

  • Not a substitute for NAS-tuned or enterprise lines if your workload is general file sharing or heavy random I/O.
  • Performance is tuned for streaming writes, so desktop or gaming use may feel slower than 7200 RPM drives.
  • Multiple part numbers can exist at the same capacity, which makes recorder compatibility checks important.
  • Very large Amazon marketplaces can mix sellers, so packaging and warranty routing should be verified at purchase.
Western Digital WD Purple Surveillance Internal Hard Drive (3.5 inch) (6 TB) — product photo
6 TB

Specifications

series
WD Purple
interface
SATA 6 Gb/s
recording
CMR
mtbf hours
1000000
form factor
3.5 inch
manufacturer
Western Digital
warranty notes
Western Digital limited warranty; confirm coverage and region on https://support.wdc.com/warranty.
warranty years
3
workload rate tbw per year
180

Researched and maintained by Hard Drive Prices Editorial Team. · Updated April 11, 2026

User ratings

  • Amazon
    4.4(1,570)

What you're getting

Western Digital WD Purple is a 3.5 inch SATA surveillance hard drive family built for DVR, NVR, and hybrid recorders that run continuously. The line targets write-heavy video workloads with many simultaneous streams, not short desktop duty cycles.

According to the published Western Digital datasheet for WD Purple SATA models, these drives carry up to a 180 TB per year workload rating, CMR recording for the listed part numbers, and a 3 year limited warranty, with details varying slightly by SKU. Many capacities also list rotational speeds around 5400 RPM class and cache sizes of 128 MB or 256 MB depending on the exact model.

WD AllFrame is the firmware-side feature set Western Digital uses to improve recording smoothness in supported environments. Compatibility still depends on your recorder firmware, chassis cooling, and camera bitrate settings, so always confirm fit with the vendor before you buy.

Capacities span mainstream sizes used in home and small-business video systems. Use the exact model number on your shopping cart page to match the recorder compatibility list, because Western Digital sometimes sells more than one SKU at the same nominal capacity.

Buying context

Typical value (not live pricing)

WD Purple is usually bought for retention and channel count, not raw $/TB bragging rights against bare desktop drives. Check the live Amazon or retailer page before you checkout, because surveillance SKUs swing with supply and third-party sellers.

Where this line often shows up

  • DVR and NVR video retention
  • Home security camera recorders
  • Small business CCTV systems
  • Compatible Lorex and Reolink enclosures when the vendor approves the SKU
  • UniFi Protect and other NVR software stacks that publish drive guidance

Features

  • Surveillance-first tuning for always-on recording in DVR and NVR enclosures.

  • WD AllFrame helps improve video recording and playback consistency in supported systems.

  • Up to 180 TB per year workload rating on WD Purple SATA models documented in the Western Digital datasheet.

  • CMR recording for the WD Purple SATA model numbers listed in the official specification tables.

  • Tarnish-resistant components on 3 TB and higher capacities per Western Digital marketing and footnotes.

  • Support for many HD camera streams in published camera-count guidance, subject to bitrate and resolution choices.

  • 3 year limited warranty as stated on Western Digital and retail listings; confirm regional terms on WD support.