WD Red Plus vs WD Purple 4TB: Which One Fits Your Setup?
Choose by the storage system first: WD positions Red Plus for RAID-oriented NAS use and Purple for 24/7 surveillance recording. If both models otherwise fit your host, Red Plus has lower manufacturer-listed average power requirements in the listed read/write, idle, and standby/sleep states; these figures are not measurements of a complete NAS or NVR.
Published by Pickoryx · Published 2026-10-16
Source checked 2026-10-16 22:43 UTC
Products compared
Product A · ASIN B0G5YDXKS7
WD Red Plus 4TB (WD40EFZZ)
Last observed offer
$194.99
Per listed package.
Offer eligibility must be confirmed on Amazon.
Checked 2026-10-19 15:24 UTC. Price and availability may change.
Product B · ASIN B071KVB4F8
WD Purple 4TB (WD40PURZ)
Last observed offer
$213.39 List Price: $229.00
Per listed package.
Offer eligibility must be confirmed on Amazon.
Checked 2026-10-19 14:25 UTC. Price and availability may change.
Pickoryx may earn a commission from qualifying purchases through the paid Amazon links on this page, at no added cost to you.
The buying question
Should a compatible NAS use the WD Red Plus WD40EFZZ or should a compatible video recorder use the WD Purple WD40PURZ, and how do their published power figures fit a multi-drive budget?
The manufacturer positions Red Plus for RAID-oriented NAS use and Purple for continuous surveillance recording; their listed average power requirements also differ by state.
Quick verdict
Choose WD Red Plus 4TB (WD40EFZZ) if
- You need a drive for a mixed-file or backup NAS and your NAS compatibility list includes WD40EFZZ.
- Your always-on multi-drive power budget is constrained and the Red Plus listed requirements fit after accounting for drive count and host overhead.
Choose WD Purple 4TB (WD40PURZ) if
- You are building a camera-centric recorder for continuous video and its NVR compatibility information includes WD40PURZ.
- Your NVR’s camera and stream configuration is within the recorder manufacturer’s supported setup, and the Purple listed power requirements fit your budget.
When the recommendation changes
- If your host is not a NAS/NVR or its exact compatibility list excludes the model, choose neither on this comparison alone.
- If your multi-drive system has a tight power budget, recalculate using the documented operating state and drive count before choosing.
The differences that matter
Host Workload And Data Pattern
WD Red Plus 4TB (WD40EFZZ)
The WD40EFZZ is listed as a 4TB, 3.5-inch SATA 6 Gb/s CMR model. WD positions the Red Plus family for RAID-optimized NAS systems, with an up-to-eight-bay family statement.[1]
WD Purple 4TB (WD40PURZ)
The WD40PURZ is listed as a 4TB, 3.5-inch drive. WD describes Purple for 24/7 surveillance recording; the sheet lists up to 64 cameras and 8+ drive bays for 4TB-and-higher models.[2]
What this changes: These are different intended workflows, not evidence that one drive performs better. Match the intended workload to the host, then check the exact NAS/NVR compatibility list and its camera, stream, and bay conditions; the family limits do not guarantee compatibility with every recorder.[1, 2]
Multi Drive Power Budget
WD Red Plus 4TB (WD40EFZZ)
For WD40EFZZ, the table lists average requirements of 4.5 W read/write, 2.9 W idle, and 0.3 W standby/sleep.[1]
WD Purple 4TB (WD40PURZ)
For WD40PURZ, the table lists average requirements of 5.1 W read/write, 4.5 W idle, and 0.4 W standby/sleep.[2]
What this changes: For a constrained multi-drive system, multiply the applicable state value by the planned number of drives and then account separately for the NAS/NVR and other components. The Red Plus published figures are lower in these listed states, but the sheets do not establish complete-system draw, cooling behavior, or energy cost.[1, 2]
Best for your routine
A mixed-file or backup NAS whose compatibility list names WD40EFZZ
Best fit: WD Red Plus 4TB (WD40EFZZ)
Based on listed features, not comparative testing.
WD positions Red Plus for RAID-oriented NAS use. Verify the exact model and bay configuration against the NAS maker’s support list.
A continuous-video recorder whose compatibility list names WD40PURZ
Best fit: WD Purple 4TB (WD40PURZ)
Based on listed features, not comparative testing.
WD positions Purple for 24/7 surveillance recording. Verify the exact NVR, camera, stream, and bay setup before buying.
A constrained drive-only power budget when both drives meet the host’s workload and compatibility requirements
Best fit: WD Red Plus 4TB (WD40EFZZ)
Based on listed features, not comparative testing.
WD lists lower average power requirements for WD40EFZZ in the cited read/write, idle, and standby/sleep states. Apply the relevant state value per drive; this is not a complete-system measurement.
Value and trade-offs
One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.
Current offers and price history were not assessed, so no premium or value recommendation is made. Compare current prices only after confirming the exact model and host fit.
No timing guidance is provided because current offers and price history were not assessed.
Limitations
- The cited figures are manufacturer-published specifications, not independent tests or measurements of a complete NAS/NVR. No comparative throughput, recording outcome, reliability, noise, cooling, or energy-cost conclusion is established.
- The WD datasheets describe product lines and model numbers; verify that the listing you buy is the exact WD40EFZZ or WD40PURZ variant and that the NAS/NVR manufacturer supports it.
- The Red Plus datasheet is dated September 2025 and the Purple datasheet is dated April 2019; specifications may change, so check the latest documentation for your exact model before purchase.
- Camera-count and drive-bay statements are manufacturer specifications, not a guarantee for every recorder, stream, bitrate, or configuration.
Questions shoppers ask
Can either drive be used in any NAS or NVR?
The datasheets describe intended product-line uses but do not certify every host. Check the NAS/NVR maker’s compatibility list for the exact drive model, bay count, camera count, and stream configuration.
How do I use the power figures for a multi-drive enclosure?
Use the value for the system’s operating state, multiply by the number of drives, then add the NAS/NVR and other component requirements. These figures describe the drive only at the manufacturer’s stated measurement conditions; they are not a complete-system reading or an energy-cost estimate.
Which drive has higher measured performance or reliability?
This comparison does not establish a performance or reliability winner. The manufacturer sheets list specifications, but no applicable independent head-to-head test or long-term evidence was used.
Methodology and sources
Compared the exact WD40EFZZ and WD40PURZ model rows for intended-use positioning and manufacturer-listed average power by state. Bay and camera counts are treated as host compatibility checks within the workflow decision. Power values are for drive-only budget planning; no maximum transfer figure was used as a measured result.
Automation helped organize source-backed model specifications and the per-state power comparison. No drive or enclosure was hands-on tested.
View 2 sources
- 1.Data Sheet: WD Red PlusWestern Digital · Official specifications · Source checked 2026-10-16 22:43 UTC
Evidence used on this page
- Pages 1–2: WD40EFZZ row; Red Plus use positioning; Power Management table and measurement footnote.: Lists WD40EFZZ as a 4TB CMR, SATA 6 Gb/s, 3.5-inch model and gives state-specific average power requirements. The Red Plus overview positions the family for RAID-optimized NAS use up to eight bays. The sheet says power measurements are at room/ambient temperature. These statements are manufacturer specifications, not observed system results.
- 2.WD Purple Series data sheetWestern Digital · Official specifications · Source checked 2026-10-16 22:43 UTC
Evidence used on this page
- Pages 1–2: 24/7 surveillance positioning; WD40PURZ row; camera/bay table; Power Management table and footnote 10.: Lists WD40PURZ in the 4TB model table and gives state-specific average power requirements. WD positions Purple for 24/7 surveillance; the 4TB row lists up to 64 cameras and 8+ drive bays. The sheet says power measurements are at room-ambient temperature. The sheet is dated April 2019; its statements are manufacturer specifications, not observed system results.