Drive comparison

ST20000NM007D vs WD201KFGX

Seagate Exos X20 20TB and Western Digital WD Red Pro 20TB, compared using published manufacturer specifications.

Seagate

Exos X20 20TB

ST20000NM007D

SATA 6 Gb/s · 3.5-inch

Check current Amazon price

Amazon US · New listing ↗

ASIN B0DFZNY6ZL

Western Digital

WD201KFGX

SATA 6Gb/s · 3.5-inch

$949.97

Amazon US · New listing ↗

ASIN B09TBF6GHJ · as of Sep 12, 2026 04:49 UTC

As an Amazon Associate I earn from qualifying purchases. Match the selected variant, condition and seller terms before ordering.

A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.

Show differences only

Manufacturer specifications for ST20000NM007D and WD201KFGX
Specification	ST20000NM007D	WD201KFGX
Manufacturer	Seagate	Western Digital
Product family	Exos X20	WD Red Pro
Model number	ST20000NM007D	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

Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.

Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.

Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.