Best 18TB Hard Drive Deals Right Now
Every 18TB hard drive we track, in one live table sorted by price per TB. Prices refresh from Amazon regions throughout the day, so the top row is the current best deal at this capacity. Below the table: what to check before you buy, and answers to the most common 18TB questions.
Updated July 28, 2026
Top 10 by Price per TB
See all 12 listings| # | Product | Capacity | Condition | Price / TB | Price | Region | |
|---|---|---|---|---|---|---|---|
| 1 | MDD MAXDIGITALDATA MDD (MDD18TS25672NAS) 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5'' Internal NAS Hard Drive (Renewed) | 17.6 TB | Used | $26.17 /TB | $460.00 | us | View |
| 2 | MDD (MDD18TS25672CCTV) 18TB 7200RPM 256MB Cache SATA 6.0Gb/s 3.5inch Internal Surveillance Hard Drive - 3 Years Warranty (Renewed) | 17.6 TB | Used | $26.74 /TB | $470.00 | us | View |
| 3 | Seagate Exos X18 ST18000NM000J 18 TB Hard Drive - Internal - SATA (SATA/600) (Renewed) | 17.6 TB | Used | $28.44 /TB | $500.00 | us | View |
| 4 | Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J (Renewed) | 17.6 TB | Used | $29.01 /TB | $510.00 | us | View |
| 5 | Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J | 17.6 TB | Used | $30.15 /TB | $530.00 | us | View |
| 6 | Seagate Exos X20 18TB 7200 RPM 512e SATA 6Gb/s 3.5" Enterprise Hard Drive - ST18000NM003D (Renewed) | 17.6 TB | Used | $30.72 /TB | $540.00 | us | View |
| 7 | Seagate Exos X20 ST20000NM007D 20TB 7.2K RPM SATA 6Gb/s 3.5in Hard Drive | 19.5 TB | Used | $34.56 /TB | $675.00 | us | View |
| 8 | Seagate Technology ST20000NM002H 20TB Exos X24 HDD 3.5 SATA 7200 ISE Bare Hard Drive | 19.5 TB | New | $40.96 /TB | $800.00 | us | View |
| 9 | Seagate (Renewed) Exos X22 20TB SATA 6Gb/s 7200RPM 3.5-inch Enterprise HDD (ST20000NM004E) | 19.5 TB | Used | $40.96 /TB | $800.00 | us | View |
| 10 | Seagate Exos X20 ST20000NM007D 20TB 7.2K RPM SATA 6Gb/s 3.5in Hard Drive | 19.5 TB | New | $43.01 /TB | $840.00 | us | View |
What to Check Before Buying a 18TB Hard Drive
For NAS, RAID, or heavy write workloads, insist on CMR. SMR drives are fine for cold backups but stall under sustained writes.
3 years is standard for desktop drives, 5 years for NAS/enterprise lines (WD Red Pro, Seagate IronWolf Pro, Toshiba N300).
NAS-class drives are rated 180-300 TB/year. Desktop drives (WD Blue, Barracuda) are rated 55 TB/year - fine for a PC, risky in a RAID array.
The single best value metric. Anything under the current market floor usually means used, shucked, or SMR - check the condition column.
Frequently Asked Questions
Is 18TB enough for a home NAS or media server?
Should I buy a new or used 18TB hard drive?
What is a good price per TB for a 18TB hard drive right now?
Want to filter by region, warranty, or condition?
The full price table compares every drive we track across Amazon US, UK, DE, FR, CA, IT, and ES.
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