Seagate Exos X18 16TB
The 16TB sweet spot of the Exos X line: helium-sealed, 7200rpm, CMR recording, rated for 550TB per year. The capacity tier where nearline cost-per-TB still beats everything newer — a proven fleet drive for JBODs, NAS heads, and backup targets. Tested stock ships from Hong Kong.
Fully Tested & Documented · Hong Kong Warehouse Stock · Worldwide Shipping 3–7 Days · 1-Year Warranty
Hardware Gallery
The Exos X18 16TB, Up Close
Exos X18 16TB — Label Verified
Label reads 16TB Exos X18, ST16000NM000J, SATA, Seagate Secure. The 000J is the classic X18 16TB SATA SKU; the later ST16000NM002H ships on the same 16TB platform and is sold as X18 or X24 depending on channel — see the FAQ.
PCB & SATA Interface
Rear view with the standard SATA data+power connector pair. Backward compatible with SATA 3Gb/s backplanes; hot-swap trays from Dell, HPE, Lenovo, and Supermicro 3.5-inch bays all fit.
270
MB/s sustained transfer
550
TB/year workload rating
2.5M
hours MTBF
16
TB helium-sealed CMR
Key Specifications
| Component | Specification |
|---|---|
| Model | Seagate Exos X18 16TB (ST16000NM000J / ST16000NM002H) |
| Form Factor | 3.5-inch, helium-sealed |
| Interface | SATA 6Gb/s, 512e (4Kn and SAS variants exist) |
| Recording | CMR, 7200 rpm, 256MB cache |
| Sustained Transfer | Up to 270 MB/s |
| Workload Rating | 550 TB/year |
| Reliability | 2.5M hours MTBF, 5-year class |
| Power / Security | PowerChoice idle management, Seagate Secure (ISE/SED options) |
At 16TB the X18 sits one step below the Exos X20 20TB on capacity — but in 2026 it often clears at meaningfully lower cost per drive, and 16TB units re-silver faster in RAID rebuilds. The Western Digital counterpart at this tier is the Ultrastar HC550 18TB. All nearline drives rotate through our enterprise storage range.
Transparent Pricing
2026 Reference Pricing by Configuration
Tracked Sep 7, 2026 — seven asking-price data points for new 16TB units across Hong Kong retail, US sellers, Australia, and the Middle East. Graded used and recertified units are quoted on request.
Asia-Pacific Channel New
$435-$537
QNAP UK Store £342.85 (approx $435, ST16000NM000J variant, 4-week lead); 2000Fun Hong Kong HK$4,000 (approx $513, boxed); ThinkBox Australia A$825.83 (approx $537). APAC channel remains the price floor in 2026.
US / Middle East Retail New
$600-$819
eBay.ca seller US$600.46, Staples $604.99 (listed under the X24 16TB naming of the same PN), Technivision $760, Technivision.ae AED 3,004.59 (approx $819).
Used / Recertified
On Request
Graded pulls and manufacturer-recertified units with full SMART readout (power-on hours, reallocated sectors, helium health). Tell us quantity and target health floor.
Asking prices, not transaction prices — volume deals typically close 5-15% below asking. Small sample per tier (n<5): indicative only. Sources: ukstore.qnap.com, openshop.com.hk, thinkboxsolutions.com.au, ebay.ca, staples.com, technivision.tech. Collected Sep 7, 2026. Full dataset: Used Server Price Index.
Origin
Hong Kong Warehouse
Free port — full export documentation
Transit
3–7 Days Air Freight
Tracked, insured, worldwide
Warranty
1-Year Warranty
Diagnostic report in every box
Quality Process
What We Test Before an Exos X18 16TB Ships
SMART & Helium Health
Power-on hours, reallocated/pending sectors, and helium integrity read from every drive — we quote the health floor before you commit.
Full-Surface Scan
Every LBA read-verified under sustained load; drives with slow or reallocated zones above threshold are rejected.
Firmware & Secure Erase
Firmware checked against Seagate's current release; drives sanitized to NIST 800-88 with certificate available on request.
Acoustic & Vibration Check
Spindle and actuator noise bench-checked — worn bearings are the first failure signal on pulled nearline drives.
PN & Interface Verification
Label PN (000J/002H) and interface (SATA vs SAS) cross-checked against firmware-reported identity — the 16TB Exos naming overlap makes this step non-optional.
Report in the Box
Every unit ships with its per-machine diagnostic report and warranty. Full process: inspection guide.
Frequently Asked Questions
How much does a Seagate Exos X18 16TB cost in 2026?
New units run $435-$537 through Asia-Pacific channels and $600-$819 at US/Middle East retail (seven asking prices tracked Sep 7, 2026 — small samples, indicative only). The 2026 nearline shortage keeps street prices well above the 2024 lows. Graded used and recertified units are quoted on request against live stock.
What is the difference between the Exos X18 16TB and the Exos X20 20TB?
Same 3.5-inch helium family and 550TB/year workload rating, but the X20 adds two platters (10 vs 9), reaches 20TB, and sustains up to 285MB/s versus the X18's 270MB/s. Per bay, the X20 packs 25% more capacity; per dollar in 2026, the X18 16TB often wins because its channel stock is deeper. Choose X20 for maximum density per slot, X18 when rebuild time and unit cost matter more.
Is ST16000NM002H an Exos X18 or an Exos X24?
Both labels circulate. Seagate's classic X18 16TB SATA SKU is ST16000NM000J; the later ST16000NM002H belongs to the same 16TB Exos platform and is marketed as X18 by some channels (including Hong Kong retail) and as X24 16TB by others (Staples, Geizhals, QNAP UK). Hardware-wise it is the same 16TB helium class — confirm interface (SATA vs SAS) and sector format (512e) on the quote, and we verify firmware identity before shipping.
What condition are HKCHL Exos X18 drives in?
New boxed, manufacturer-recertified, and graded used pulls are all available. Every drive ships with its SMART readout (power-on hours, reallocated sectors), a full-surface scan result, NIST 800-88 sanitization on request, and a 1-year warranty. We quote the health floor before you pay.
Can you ship Exos X18 16TB to the US, Europe, or Asia?
Yes — worldwide shipping from our Hong Kong warehouse with full export documentation and anti-static, foam-suspended packing; express air-freight typically arrives in 3-7 days to major markets. For JBOD-scale orders we palletize and combine freight to reduce per-unit cost.
Get a Current Exos X18 16TB Quote
Tell us quantity and condition preference (new boxed, recertified, or graded pull with health floor) — we confirm live stock and ship worldwide from Hong Kong, usually within one business day.
Request a Quote