Western Digital · Desktop
WD20EARZ
WD Blue 2TB
SATA 6Gb/s · 3.5-inch · CMR
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An exact Amazon listing has not been verified for this model yet.
Compare alternatives ↓As an Amazon Associate I earn from qualifying purchases.The Western Digital WD20EARZ is a 2TB WD Blue hard drive for desktop storage, using SATA 6Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | WD20EARZ |
|---|---|
| Nominal capacity | 2 TB · 2000 GB |
| RPM | 5400 |
| Interface | SATA 6Gb/s |
| Recording | CMR |
| Cache (MB) | 64 |
| 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 WD20EARZ, 2TB 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.
No verified exact-model ASIN is linked yet. This does not establish whether the model is currently available. Compare the alternatives below and check their listings.
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
ST2000DM001
2TB · SATA 6 Gb/s
Compare with WD20EARZ →View on Amazon US ↗ASIN B008BRE06E · Check price and conditionSeagate · BarraCuda
ST2000DM008
2TB · SATA 6 Gb/s · SMR
Compare with WD20EARZ →View on Amazon US ↗ASIN B075QJTBVT · Check price and conditionWestern Digital · WD_BLACK
WD2003FZEX
2TB · SATA 6Gb/s · CMR
Compare with WD20EARZ →View on Amazon US ↗ASIN B00GNBQCHA · Check price and conditionWD20EARZ questions answered
Is WD20EARZ CMR or SMR?
The manufacturer lists CMR recording for WD20EARZ. Other models and capacities in the same family can differ.
What connection does WD20EARZ need?
WD20EARZ 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 WD20EARZ provide?
Its nominal capacity is 2000 GB, approximately 1862.6 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for WD20EARZ?
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.