Seagate Exos X18 12TB
The Seagate Exos X18 12TB costs $530.00 right now, or $44.17/TB. The 14TB is cheaper per terabyte at $37.06/TB. Stepping up to the 14TB costs -$11.11 more.
Prices update daily and may differ at the retailer. This page contains affiliate links.
Where to buy the Seagate Exos X18 12TB
Every in-stock offer we track, cheapest first.
- Newegg$530.00
- Amazon$639.99
Price history
Lowest in the last 30 days: $530.00. Lowest in 60 days: $530.00.
Show the data as a table
| Date | Lowest price |
|---|---|
| Sep 25, 2026 | $530 |
| Sep 24, 2026 | $530 |
| Sep 23, 2026 | $530 |
| Sep 22, 2026 | $530 |
| Sep 21, 2026 | $530 |
| Sep 20, 2026 | $530 |
| Sep 19, 2026 | $530 |
Lowest in-stock price each day at Newegg and B&H, across every version of this drive we list (including heatsink editions). Lowest point $530.00 on Sep 19; latest $530.00. Amazon prices appear in the offer list but are not charted.
Specifications
Drive
- Capacity
- 12TB
- Form factor
- 3.5"
- Spindle speed
- 7,200 RPM
- Recording
- CMR
- Cache
- 256 MB
- Helium-filled
- Yes
Conventional recording: steady write speed and normal RAID rebuilds.
Rated for
- Use class
- Enterprise
- MTBF
- 2.5 million hours
- Warranty
- 5 years
Noise and power
- Idle power
- 4.4 W
Identity
- Part number
- ST12000NM000J
- Other versions
- ST12000NM001J
Measured failure rate
Backblaze runs this exact model in its datacenter and publishes how often the drives fail. Over 2025Q2-2026Q1 it recorded 0.49% a year (1,077 drives), from 5 failures across 370,023 drive-days. That is a datacenter running drives continuously, which is harder use than a desktop, and it says nothing about the other capacities in this family. Source: Backblaze Drive Stats.
Quality score
How we score →Scored from recording type (CMR or SMR), workload rating, warranty, measured failure rate where Backblaze covers the model, spindle speed, MTBF and cache. Use class and size filter; they never score.
Value weighs the score against the price, compared with other 12TB hard drives: this drive costs $44.17/TB against a typical $44.17/TB. At a typical price, value equals the score. Cheaper raises it and dearer lowers it, but price counts for less than quality.
A factor we hold no value for scores zero rather than being skipped, so a drive we know little about never outranks a fully documented one. A low score with low confidence means undocumented, not bad. This is a specification index, not a benchmark, and it only compares hard drives with each other.
See every capacity of the Seagate Exos X18 on one page, or compare it with every other drive on the Hard Drives table. For what a hard drive gives up against an SSD, see SSD vs HDD.
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