Drive comparison
ST20000NM000D vs WD201KFGX
Seagate Exos X20 20TB and Western Digital WD Red Pro 20TB, compared using published manufacturer specifications.
Seagate
Exos X20 20TB
ST20000NM000D
SATA 6 Gb/s · 3.5-inch
$944.45
Amazon US · New listing ↗ASIN B0B1S3MKL4 · as of Sep 12, 2026 11:46 UTC
Full specifications & all listings →
Western Digital
WD Red Pro 20TB
WD201KFGX
SATA 6Gb/s · 3.5-inch
$949.97
Amazon US · New listing ↗ASIN B09TBF6GHJ · as of Sep 12, 2026 04:49 UTC
Full specifications & all listings →As an Amazon Associate I earn from qualifying purchases. Match the selected variant, condition and seller terms before ordering.
What differs between these models?
- Interface: ST20000NM000D lists SATA 6 Gb/s; WD201KFGX lists SATA 6Gb/s.
A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.
Specifications side by side
| Specification | ST20000NM000D | WD201KFGX |
|---|---|---|
| Manufacturer | Seagate | Western Digital |
| Product family | Exos X20 | WD Red Pro |
| Model number | ST20000NM000D | WD201KFGX |
| Capacity (TB) | 20 | 20 |
| FIPS | No | Not recorded |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Form factor | 3.5-inch | 3.5-inch |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| RPM | Not recorded | 7200 |
| Recording | Not recorded | CMR |
| Cache (MB) | Not recorded | 512 |
| Workload rating (TB/year) | Not recorded | 550 |
| Physical sector size (bytes) | Not recorded | 4096 |
| Sustained transfer (up to MB/s) | Not recorded | 268 |
Compatibility and buying checks
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
ST20000NM000D
Seagate Exos X20 manufacturer specifications ↗
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
WD201KFGX
Western Digital WD Red Pro manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.