WD NasWare Red WD40EFRX 4 TB CMR
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Quiet and reliable built-in (internal) 3.5" form factor hard drive from the 2020 model WD Red HDD family. This line includes SATA3 drives with capacities ranging from 1 GB to 14 TB, whose firmware and design are optimized for long-term data storage tasks in NAS arrays. Such hard drives are adapted for use in SOHO NAS (small office/home office), are compatible with almost all modern file storage models, and are characterized by an impressive operational resource.
The WD NasWare Red WD40EFRX hard drive is positioned as a mid-price category product intended for use in home and office storage (up to 8 drives), connected to a local network via high-speed network cables or wireless connections. This model uses classic magnetic recording technology CMR, which allows for an enhanced data transfer speed, and the magnetic platters themselves rotate at a speed of 5400 rpm.
This ensures moderate heat dissipation (4.5W), which is important for creating multi-disk home NAS systems with quiet cooling. It can also be used as an additional HDD drive in a home PC, gaming, or multimedia system. It is not recommended for use as a system drive, but it is excellent for storing large volumes of work project files, video, photo, and high-quality audio content, as well as backups.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog WD 2025 - new arrivals, bestsellers, and the most relevant models WD.
Buy WD NasWare Red WD40EFRX 4 TB CMR
All prices 8 →Western Digital Red 4TB internal hard drive Variable 64 MB 3.5" S WD40EFRX-RFB | £96.02 |  | |||
Western Digital Red internal hard drive 4 TB 5400 RPM 64 MB 3.5" Serial ATA III WD40EFRX | £121.99 |  | |||
Western Digital Red 4TB internal hard drive Variable 64 MB 3.5" S WD40EFRX-RFB | £143.21 |  | |||
| £143.21 |  | ||||
| £146.08 |  | ||||
1 2 7 11 |
Two 4TB drives in a zero RAID, I expected much more in terms of performance. After a year, one failed. The old 1TB Seagate with PS works faster. It's hard to say, I bought it because of its former glory, but I was wrong. Questionable reliability  Valeriy Proshkin: use WD WD40EFRX more than year |
2TB model - quiet, cool, reliable, 10 units in operation - 2 have already accumulated over 20,000 hours, the entire surface of the disks is good, with fast access time 4TB model - quiet in standby, barely audible in operation, warm 8TB model - quiet in standby, clearly audible in operation, hot up to 52 degrees 2TB model - quiet, cool, reliable 4TB model - quiet in standby, slightly audible in operation, warm 8TB model - quiet in standby, clearly audible in operation, fast 8TB model and above - the main drawback is helium, it is not eternal and constantly dissipates through the case. Unsuitable for "eternal" storage. |
good quality product I think the main advantage is that it is optimized for consumer NAS. They behave normally at work and remain cool. This is a very good indicator. This model is cheaper than buying the RE series. They are more reliable in operation than desktop models. not found Andrey: use WD WD10EFRX week |
WD NasWare Red WD40EFRX configurations
| Price for WD NasWare Red WD40EFRX | ||||
|---|---|---|---|---|
| WD NasWare Red WD10EFRX 1 TB | from £49.60 | 5 offers | |
| WD NasWare Red WD20EFRX 2 TB | from £79.75 | 7 offers | |
| WD NasWare Red WD30EFRX 3 TB CMR | from £89.99 | 8 offers | |
 | WD NasWare Red WD30EFAX 3 TB SMR | from £138.91 | 1 offer | |
| WD NasWare Red WD40EFRX 4 TB CMR | from £96.02 | 9 offers | |
| WD NasWare Red WD40EFAX 4 TB SMR | from £153.49 | 2 offers | |
| WD NasWare Red WD60EFRX 6 TB CMR | from £230.90 | 4 offers | |
 | WD NasWare Red WD60EFAX 6 TB SMR | from £151.99 | 1 offer | |
 | WD NasWare Red WD80EFAX 8 TB 256/5400 | from £244.99 | 1 offer | |
| WD NasWare Red WD100EFAX 10 TB WD100EFAX | from £369.99 | 1 offer | |
| WD NasWare Red WD101EFAX 10 TB WD101EFAX | from £611.90 | 3 offers | |
Red Baron
De jure, WD Red is a hard drive for creating RAID arrays (mirror or serial) and installing in NAS servers. The spindle speed is 5400 rpm, that is, compared to other PC components, it is almost silent. 64 MB of buffer memory to speed up the processing of the smallest files. Sequential read and write is performed at 150 – 160 MB / s, which is quite fast by the standards of low-speed HDDs.
Round the clock work
Implemented in Red a number of proprietary technologies WD. First, NASware 3.0 firmware provides 100% compatibility with popular NAS server models, 24/7 operation, and easy RAID scalability. Simply put, you can install additional drives even without having to reboot your PC or NAS server — the operating system will attach them to the shared disk space, as they say, "on the fly".
Quiet and smooth
Secondly, 3D Active Balance Plus balances magnetic plates in two planes with precision, thereby reducing vibration and increasing HDD reliability. Finally, thirdly, IntelliPower automatically changes the data transfer rate and the smart caching algorithm depending on the load. Indeed, from our personal experience we can confirm that Red, regardless of the size, are among the quietest 3.5-inch HDDs on the market.
For home and office
But de facto, the WD Red is a fairly versatile, quiet and reliable hard drive that's great for a home or work PC as an addition to a fast but low-capacity SSD. That is, whether the scope of its application is not limited to NAS servers alone. WD Red is not suitable except for the role of the main system drive — for this task it is better to choose Blue or Black at 7200 rpm (read and write speed 200 – 220 MB / s).
