Drive comparison
ST20000NM002H vs HDWG82AXZSTB
Seagate Exos X24 20TB and Toshiba N300 Pro 20TB, compared using published manufacturer specifications.
Seagate
Exos X24 20TB
ST20000NM002H
SATA 6 Gb/s · 3.5-inch
$799.99
Amazon US · New listing ↗ASIN B0CN5LH117 · as of Sep 12, 2026 11:42 UTC
Full specifications & all listings →
Toshiba
N300 Pro 20TB
HDWG82AXZSTB
SATA 6 Gb/s · 3.5-inch
$912.35
Amazon US · New listing ↗ASIN B0GWF54V5M · as of Sep 12, 2026 11:46 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?
- Cache (MB): ST20000NM002H lists 512; HDWG82AXZSTB lists 1024.
- Sustained transfer (up to MB/s): ST20000NM002H lists 285; HDWG82AXZSTB lists 294.
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 | ST20000NM002H | HDWG82AXZSTB |
|---|---|---|
| Manufacturer | Seagate | Toshiba |
| Product family | Exos X24 | N300 Pro |
| Model number | ST20000NM002H | HDWG82AXZSTB |
| Capacity (TB) | 20 | 20 |
| RPM | 7200 | 7200 |
| Interface | SATA 6 Gb/s | SATA 6 Gb/s |
| Cache (MB) | 512 | 1024 |
| Form factor | 3.5-inch | 3.5-inch |
| Average idle power (W) | 6.3 | Not recorded |
| Power-on hours per year | 8760 | Not recorded |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 285 | 294 |
| NAS bays | Not recorded | 24 |
| Recording | Not recorded | CMR |
| Sector format | Not recorded | 512e |
| Idle power (W) | Not recorded | 4.35 |
| Package / region | Not recorded | US retail; manufacturer-documented bulk package alias |
| Workload rating (TB/year) | Not recorded | 550 |
| Average operating power (W) | Not recorded | 7.62 |
| Rotational vibration sensors | Not recorded | Yes |
Compatibility and buying checks
- Check sector-format support in the controller and operating system, particularly for native 4K (4Kn) variants.
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
ST20000NM002H
Seagate Exos X24 manufacturer specifications ↗ · pages 2
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
HDWG82AXZSTB
Toshiba N300 Pro US datasheet TAEC-2839-R2.0, July 2026 ↗ · pages 3, 7
Reviewed 2026-09-08. Published specifications; no independent benchmark or failure-rate claim.