(Old Model) WD Green 4TB Desktop Hard Drive: 3.5-inch, SATA 6 Gb/s, IntelliPower, 64MB Cache WD40EZRX
*Price sourced from Amazon.com. Last updated 2026-07-06. Price and availability subject to change.
Bottom line: The (Old Model) WD Green 4TB Desktop Hard Drive: 3.5-inch, SATA 6 Gb/s, IntelliPower, 64MB Cache WD40EZRX is a niche pick — read recent reviews before buying in the drives & media category, priced around $114.99. Read recent reviews carefully before committing.
SpecificationsMfr Part Number:WD40EZRXCapacity:4 TBRotational Speed:IntelliPowerCache:64 MBInterface:SATA 6 Gb/sData Transfer Rate (Max):Buffer to Host:6 Gb/sHost to/from Drive (Sustained):150 MB/sShock:Operating:65Gs @ 2ms (read/write); 30Gs @ 2ms (read)Non-operating:250Gs @ 1msAcoustics:Idle Mode:Â25 dBA (average)Seek Mode: 28 dBA (average)Power Management:12VDC ±10% (Peak):1.75 ARead/Write:4.5 WattsIdle:3.3 WattsStandby:0.4 WattsSleep:0.4 WattsForm Factor:3.5 inchDimensions (WxLxH):4.000 x 5.787 x 1.028 inch / 101.6 x 147.0 x 26.1 mmWeight:1.5 lbs / 0.68 kgRoHS Compliant
SpecPicks Verdict
SpecPicks classifies (Old Model) WD Green 4TB Desktop Hard Drive: 3.5-inch, SATA 6 Gb/s… as a niche pick — read recent reviews before buying in the drives & media category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Western Digital's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for drives & media of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ 2 year limited warranty.
- ✓ Backed by Western Digital's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- WD Green hard drives reduce power consumption by up to 40% and offer best-in-class acoustics and operating temperature and 3rd generation SATA interface.
- IntelliPower - A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance.
- IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration.
- 4 TB capacity holds up to 800,000 digital photos, 1,000,000 MP3 files, and 300 hours of HD video.
- 2 year limited warranty.
- Package includes a hard drive only - no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessary.
Full Specifications
| Brand | Western Digital |
|---|---|
| Color | Green |
| Model Name | Green |
| Read Speed | 150 Megabytes Per Second |
| Unit Count | 1.0 Count |
| Form Factor | 3.5-inch |
| Media Speed | 100 MB/s |
| Model Number | WD40EZRX |
| Built-In Media | Hard Drive |
| Hard-Drive Size | 4 TB |
| Mfr Part Number | WD40EZRX |
| Number of Items | 1 |
| Special Feature | Portable |
| Item Part Number | WD40EZRX |
Ready to buy?
(Old Model) WD Green 4TB Desktop Hard Drive: 3.5-inch, SATA 6 Gb/s, IntelliPower, 64MB Cache WD40EZRX is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-07-06. Price and availability subject to change.
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