Western Digital · NAS
WD201KFGX
WD Red Pro 20TB
SATA 6Gb/s · 3.5-inch · CMR
Exact Amazon US product
$949.97
View on Amazon US ↗New listing · ASIN B09TBF6GHJ
Price as of Sep 12, 2026 04:49 UTC
The Western Digital WD201KFGX is a 20TB WD Red Pro hard drive for NAS storage, using SATA 6Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | WD201KFGX |
|---|---|
| Nominal capacity | 20 TB · 20000 GB |
| RPM | 7200 |
| Interface | SATA 6Gb/s |
| Recording | CMR |
| Cache (MB) | 512 |
| Form factor | 3.5-inch |
| Workload rating (TB/year) | 550 |
| Physical sector size (bytes) | 4096 |
| Manufacturer limited warranty | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 268 |
Source: Western Digital WD Red Pro 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 268 MB/s sustained transfer, as specified by the manufacturer. This is not a measured game-loading or random-I/O result.
- 550 TB/year workload rating. This is a workload limit, not a promise of drive lifespan or a backup guarantee.
Before ordering
Match WD201KFGX, 20TB 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 B09TBF6GHJ
$949.97 · as of Sep 12, 2026 04:49 UTC
Amazon US · ASIN B09TBF6GHJ
$799.99 · as of Sep 12, 2026 04:49 UTC
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.
Toshiba · N300 Pro
HDWG82AXZSTB
20TB · SATA 6 Gb/s · CMR
Compare with WD201KFGX →View on Amazon US ↗ASIN B0GWF54V5M · Check price and conditionToshiba · MG10
MG10ACA20TE
20TB · SATA 6 Gb/s
Compare with WD201KFGX →View on Amazon US ↗ASIN B0H29Y9ZX5 · Check price and conditionSeagate · Exos X24
ST20000NM002H
20TB · SATA 6 Gb/s
Compare with WD201KFGX →View on Amazon US ↗ASIN B0CN5LH117 · Check price and conditionWD201KFGX questions answered
Is WD201KFGX CMR or SMR?
The manufacturer lists CMR recording for WD201KFGX. Other models and capacities in the same family can differ.
What connection does WD201KFGX need?
WD201KFGX 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 WD201KFGX provide?
Its nominal capacity is 20000 GB, approximately 18626.5 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for WD201KFGX?
Manufacturer specification: 5 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.