Seagate · Enterprise
ST18000NM003D
Exos X20 18TB
SATA 6 Gb/s · 3.5-inch
Exact Amazon US product
$682.58
View on Amazon US ↗New listing · ASIN B09MWLJ1P5
Price as of Sep 12, 2026 11:45 UTC
The Seagate ST18000NM003D is a 18TB Exos X20 hard drive for server and enterprise storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | ST18000NM003D |
|---|---|
| Nominal capacity | 18 TB · 18000 GB |
| FIPS | No |
| Interface | SATA 6 Gb/s |
| Form factor | 3.5-inch |
| Manufacturer limited warranty | 5 years (eligible new drives) |
Source: Seagate Exos X20 manufacturer specifications. Reviewed 2026-09-07. Published specifications, not our benchmark results.
What the specifications mean
Before ordering
Match ST18000NM003D, 18TB and SATA 6 Gb/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 B09MWLJ1P5
$682.58 · as of Sep 12, 2026 11:45 UTC
Amazon US · ASIN B0BSZL39NH
$569.99 · as of Sep 12, 2026 10:58 UTC
Amazon US · ASIN B09MWLJ1P5
$648.00 · as of Sep 12, 2026 11:45 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.
Western Digital · WD Gold
WD181KRYZ
18TB · SATA 6Gb/s · CMR
Compare with ST18000NM003D →View on Amazon US ↗ASIN B09BHTP2HC · Check price and conditionWestern Digital · WD Red Pro
WD181KFGX
18TB · SATA 6Gb/s · CMR
Compare with ST18000NM003D →View on Amazon US ↗ASIN B08QVFKGQR · Check price and conditionToshiba · MG09
MG09ACA18TE
18TB · SATA 6 Gb/s
Compare with ST18000NM003D →View on Amazon US ↗ASIN B093Z5LFWD · Check price and conditionST18000NM003D questions answered
What connection does ST18000NM003D need?
ST18000NM003D uses SATA 6 Gb/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 ST18000NM003D provide?
Its nominal capacity is 18000 GB, approximately 16763.8 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for ST18000NM003D?
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.