Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" -WD40EFPX
Condition: Used - Good
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This item is eligible for return within 30 days of receipt
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Availability:
Only 1 left in stock, order soon!
Arrives
Sunday, Nov 8
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At a glance
- Condition
- Used - Good
- Capacity
- 4TB
- Style
- 256 MB Cache
- Model
- WD40EFPX
- Storage
- 4 TB
- Weight
- 0.68 kg
- Color
- Red
- Warranty
- 3 years limited warranty
- Works with
- NAS System
Features 5
- Available in capacities ranging from 1-14TB(1) with support for up to 8 bays | (1) 1MB = 1 million bytes, 1GB = 1 billion bytes, and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.Specific uses: NAS,Business
- Supports up to 180 TB/yr workload rate(2) | (2) Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.
- NASware firmware for compatibility
- Built for small or medium business NAS systems in a 24/7 environment
- 3-year limited warranty(3) | (3) MTBF specifications are based on a sample population and are estimated by statistical measurements and acceleration algorithms under typical operating conditions: workload of 90TB/year and drive temperature of 40C. Derating of MTBF will occur above these parameters, up to 65C drive temperature. MTBF does not predict an individual drives reliability and does not constitute a warranty. Not all products may be available in all regions of the world.
Description
Packed with power to handle NAS environments in home offices up to medium- sized businesses, WD Red Plus is ideal for helping protect, archive, and share valuable data in NAS systems with up to 8 bays. WD Red Plus NAS drives give you the flexibility, versatility, and confidence you need for your important home and work files.
Specs 31
| Digital Storage Capacity | 4 TB |
|---|---|
| Hard Disk Interface | Serial ATA-600 |
| Connectivity Technology | SATA |
| Brand | Western Digital |
| Special Feature | Portable |
| Hard Disk Form Factor | 3.5 inches |
| Hard Disk Description | Mechanical Hard Disk |
| Installation Type | Internal Hard Drive |
| Color | Red |
| Additional Features | Portable |
| Hard Disk Rotational Speed | 5400 rpm |
| Specific Uses For Product | Business, NAS |
| Read Speed | 150 MB/s |
| Cache Memory Installed Size | 4 |
| Form Factor | 3.5-inch |
| Hardware Connectivity | SATA 6.0 Gb/s |
| Compatible Video Game Console Models | Sony PlayStation 5 |
| Hard-Drive Size | 4 TB |
| Item Weight | 0.68 kg |
| Item Dimensions L x W x Thickness | 5.79"L x 4"W x 1.03"Th |
| Number of Items | 1 |
| Unit Count | 1 Count |
| Model Number | WD40EFPX |
| Built-In Media | Internal Hard Drive |
| Model Name | Red Plus |
| Manufacturer | Western Digital Technologies, Inc. |
| Global Trade Identification Number | 94 |
| UPC | 718037899794 |
| Item Type Name | Internal Hard Drive |
| Mfr Part Number | WD40EFPX |
| Enclosure Material | Information Not Available |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Good Product
Capacity: 4TB
Style: 256 MB Cache
This hard drive works well and was easy to install. It was recognized right away and is a good option for extra storage or a NAS setup. It runs quietly, has plenty of space, and feels like a reliable drive for backups and everyday file storage.
Reviewed in the United States on June 2, 2026 by Amazon Customer
Western Digital hard drives are reliable for my home NAS
Capacity: 4TB
Style: 256 MB Cache
Have been using Western Digital drives in my home NAS for many years. They’re reliable and of course don’t last forever but I do get a few years use before they finally die. Fortunately, a RAID configuration keeps a dead drive from turning into a disaster whereas I can order a replacement in a timely manner.
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Reviewed in the United States on January 27, 2026 by jolaco
WD Red for the Win
Capacity: 4TB
Style: 256 MB Cache
I have always used the WD Red drives in my servers and NAS units since they brought them out...this is going all the way back to the WHS 2011. They are good drives, economically priced and last for ever in the right conditions. I recently migrated over from a WHS box to a WD server, and these were the natural choice for it. They were recognized immediately and set up quickly in the WD server. As I monitor the health, there have been no critical issues for the drives in the 7 months they've been in the WD server. I recently added two more 4TB drives in the Raid 1 function, which now gives me 8TB of secure and stable storage. This matches the level of performance that my original 4- 1TB Red drives I had in my WHS 2011 server, which to this day, is still showing as healthy in the pooled drive array as reported in the SMART monitoring.
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Reviewed in the United States on December 3, 2023 by fuel98rider
Excellent price and quikc delivery. Exactly what I needed.
Capacity: 4TB
Style: 256 MB Cache
Excellent price and quikc delivery. Exactly what I needed.
Reviewed in the United States on August 30, 2026 by Sudeep Agrawal
Perfect
Capacity: 4TB
Style: 256 MB Cache
Perfect
Reviewed in the United States on June 21, 2026 by Averil M.
Review: My rocky two-year run with WD Red Plus 4TB drives
Capacity: 4TB
Style: 256 MB Cache
I built a small TrueNAS box with four WD Red Plus 4TB drives. Within the first year, one drive began throwing SMART errors. Because past RMAs with WD had taken a month or more, I bought a fifth drive out-of-pocket to keep the NAS healthy while I waited on support. Things went downhill from there. Eventually two drives started failing around the same time—the point where this whole troubleshooting saga began. I tried to use a “white-label” WD replacement they’d sent me the year before (kept sealed as a cold spare), but it was dead on arrival. That pushed me to buy a sixth drive to stay afloat and RMA the DOA unit. When the RMA replacement finally arrived, it lasted about two weeks before it started logging read errors and then disappeared entirely from the system. I opened another RMA. As of now, I’ve purchased or received a total of 8 WD Red Plus drives and 5 of them have failed in some way (including the DOA spare and the two-week wonder). I’m still waiting on two outstanding RMA replacements, and I’ve just added another drive to the RMA queue. This round, I cut my losses and bought a Seagate IronWolf Pro 4TB to replace the latest failure. What went well When they work, performance and acoustics are fine for a home NAS. WD does honor RMAs. What didn’t Reliability (for me) was poor: 5/8 drives failed within ~2 years. RMA speed: turnarounds often stretched to a month or more. Confidence hit: receiving a DOA replacement and a replacement that died in ~2 weeks eroded trust. Verdict Based on my experience, I can’t recommend WD Red Plus 4TB drives. The failure rate, DOA spare, and slow RMA cycle created too much risk for my data and too much hassle for me. I’ve moved to Seagate IronWolf Pro to restore some confidence in the array. Tips I learned the hard way Test every spare immediately (SMART short + long) so you can RMA within the seller’s return window. Monitor SMART weekly and schedule ZFS scrubs; act on “pending sector” or read-failure alerts right away. Keep a known-good spare on hand to minimize downtime while RMAs drag on. Your mileage may vary, but this was my honest, first-hand experience with WD Red Plus 4TBs.
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Reviewed in the United States on October 7, 2025 by Nate
Good drive poor shipping
Capacity: 4TB
Style: 256 MB Cache
Good drive. Poor shipping. The drive itself works fine. However the shipping was terrible. I ordered two 4T drives and a NAS. It took 2 weeks to arrive then one of those drives was damaged and in operable. I returned it and order another. The replacement came 3 weeks later. Just in original packaging with no over box or padding. Lucky this one worked but could have been damaged easily the way it was shipped. Definitely not what i expected from an Amazon retailer.
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Reviewed in the United States on January 20, 2026 by Jeff
Great product but not discrete
Capacity: 4TB
Style: 256 MB Cache
Quality product but it was not shipped in a plain box that hid what it was. It was shipped as seen in the pics with a shipping label placed on the retail box, meaning anyone who drove by my house could see a new hard drive sitting on my porch until I came home from work to bring it inside and anyone who encountered it during shipping knew exactly what it was. Considering I've had drives disappear during shipping before I was kind of surprised this was shipped in this manner. Other than that it was as advertised and works as expected as a replacement for a failed drive in my NAS.
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Reviewed in the United States on February 16, 2024 by Jason Williams