The Seagate Exos X20 20TB is a 20TB SATA-6G HDD in new condition. It has no current offer on Amazon. The in-stock alternatives nearest its capacity are listed below.
6 in-stock listings · this listing has no current offer on Amazon · ranked by live cost per tb, refreshed about once a day
| Drive | Capacity | Interface | Recording | Condition | $/TB | Price | |
|---|---|---|---|---|---|---|---|
| Seagate Exos X20 18TB SATA ST18000NM003D | 18TB | SATA-6G | — | NEW | $39.94 | $719 | Buy on Amazon |
| WD Ultrastar 22TB SATA WUH722222ALE604 WUH722222ALE604 | 22TB | SATA-6G | — | REFURB | $40.55 | $892 | Buy on Amazon |
| WD Purple Pro 18TB WD181PURP WD181PURP | 18TB | SATA-6G | CMR | REFURB | $40.56 | $730 | Buy on Amazon |
| WD Gold 22TB | 22TB | SATA-6G | — | NEW | $46.67 | $1027 | Buy on Amazon |
| WD Red Pro 22TB NAS WD221KFGX WD221KFGX | 22TB | SATA-6G | CMR | NEW | $49.95 | $1099 | Buy on Amazon |
| WD Ultrastar 22TB SATA | 22TB | SATA-6G | — | NEW | $64.33 | $1415 | Buy on Amazon |
Where this listing sits: every 20TB hard drive · 20TB SATA drives · Seagate 20TB SATA — each page is the live ranking for that slice of the catalogue.
Part number: ST20000NM002H — decoded, with sibling variants and the warranty check.
| Drive | Interface | Cond | $/TB | Price | |
|---|---|---|---|---|---|
| WD Ultrastar 20TB SATA WUH722020ALE604 | SATA-6G | Refurb | $31.50 | $630.00 | Buy on Amazon |
| MDD 20TB SATA 7200RPM NAS | SATA-6G | Refurb | $32.50 | $649.99 | Buy on Amazon |
| Seagate SkyHawk AI 20TB ST20000VE003 | SATA-6G | New | $44.00 | $879.99 | Buy on Amazon |
| WD Ultrastar 20TB SATA WUH722020CLE6L4 | SATA-6G | New | $49.01 | $980.13 | Buy on Amazon |
All 20TB drives we track, ranked by cost per terabyte.
CMRSource: Seagate Exos data sheet DS2046.1 (Dec 2025), SATA ISE table, read 2026-10-01 Recording technology for this model
Part of the Seagate line we track.
The Seagate Exos X20 20TB is a 20TB SATA-6G enterprise drive - CMR recording makes it safe for all RAID levels and NAS deployments. New unit with full 5-year warranty.
We do not have enough in-stock comparators of this type today to place this price against the rest of the market. The category page below ranks everything we do have.
These are third-party figures about the retail market as a whole, quoted and dated. They are not our own measurements and they do not describe this specific drive.
Resolved against manufacturer compatibility lists we read and dated, capped at 4. Vendor-listed means the manufacturer names this exact part number; fit-verified is our own check of form factor, interface and recording technology against a published requirement. Neither is a guess, and a drive the registry cannot resolve shows nothing here rather than a maybe. How compatibility actually works
Not right now: Amazon shows no current offer for ASIN B0CN5LH117. The in-stock alternatives nearest its 20TB capacity are on this page, ranked by live price.
This listing (ST20000NM002H, ASIN B0CN5LH117) carries no renewed, recertified, refurbished or pulled claim in its title, and Amazon reports it as new. On this site that is what "new" means: sold as factory-new. The stored warranty on this row is 5 years, as the listing states it.
The ST20000NM002H's stored recording technology is CMR (manufacturer-sourced), which rebuilds predictably in RAID.