Western Digital · Desktop
WD40EZAX
WD Blue 4TB
SATA 6Gb/s · 3.5-inch · CMR
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View on Amazon US ↗Used / renewed listing · ASIN B0CX5LX5GJ
Listing details ↓As an Amazon Associate I earn from qualifying purchases.The Western Digital WD40EZAX is a 4TB WD Blue hard drive for desktop storage, using SATA 6Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | WD40EZAX |
|---|---|
| Nominal capacity | 4 TB · 4000 GB |
| RPM | 5400 |
| Interface | SATA 6Gb/s |
| Recording | CMR |
| Cache (MB) | 256 |
| Form factor | 3.5-inch |
| Physical sector size (bytes) | 4096 |
| Manufacturer limited warranty | 2 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 180 |
Source: Western Digital WD Blue manufacturer datasheet. Reviewed 2026-08-21. Published specifications, not our benchmark results.
What the specifications mean
- CMR recording is specified for this exact model. Check enclosure support and workload limits before installing it in an array.
- Up to 180 MB/s sustained transfer, as specified by the manufacturer. This is not a measured game-loading or random-I/O result.
Before ordering
Match WD40EZAX, 4TB and SATA 6Gb/s against the selected offer. Check your system’s exact-model compatibility list and the seller’s warranty and return terms.
Amazon US listings
Exact model matches on Amazon.com. A verified ASIN identifies the product; it does not guarantee current stock. Check the selected variant, condition and seller.
Amazon US · ASIN B0CX5LX5GJ
Same-capacity alternatives with Amazon US links
These models share the drive type, interface class and capacity. Compare their specifications and your system requirements before choosing a replacement.
Seagate · Desktop HDD
ST4000DM000
4TB · SATA 6 Gb/s
Compare with WD40EZAX →View on Amazon US ↗ASIN B00IN6XMAS · Check price and conditionToshiba · P300
HDWD240UZSVA
4TB · SATA 6 Gb/s
Compare with WD40EZAX →View on Amazon US ↗ASIN B08LTDY8Q7 · Check price and conditionWestern Digital · WD_BLACK
WD4005FZBX
4TB · SATA 6Gb/s · CMR
Compare with WD40EZAX →View on Amazon US ↗ASIN B0792G331G · Check price and conditionWD40EZAX questions answered
Is WD40EZAX CMR or SMR?
The manufacturer lists CMR recording for WD40EZAX. Other models and capacities in the same family can differ.
What connection does WD40EZAX need?
WD40EZAX uses SATA 6Gb/s and a 3.5-inch form factor. Match both with the computer, controller or enclosure. An M.2 slot, 2.5-inch bay and 3.5-inch bay are not interchangeable.
How much usable space does WD40EZAX provide?
Its nominal capacity is 4000 GB, approximately 3725.3 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for WD40EZAX?
Manufacturer specification: 2 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.