Seagate 18 TB: price per TB and price history
Part number ST18000NM000JASIN B08JV6PP9BBrand SeagateInternal 3.5"
The Seagate 18 TB (ST18000NM000J) is an internal 3.5-inch hard drive by Seagate with CMR recording. On amazon.com it costs $712.00 new, which is $39.56 per TB (as of Oct 27, 2026, 9:17 PM UTC). The TB index for internal 3.5-inch hard drives is $36.25 per TB.
Price per TB, New
Total $712.00 for 18 TB, cheapest new offer, excl. shipping
- 1 day
- ▲ 2.6 %
- 7 days
- ▲ 1.6 %
- 30 days
- 0.0 %
- 90-day low
- 37.97
90 days
Price per TB, Used
Total $575.00 for 18 TB, cheapest used offer, excl. shipping
- 1 day
- ▲ 18.3 %
- 7 days
- ▲ 18.3 %
- 30 days
- ▲ 26.3 %
- 90-day low
- 23.33
90 days
How much does the Seagate 18 TB cost per TB?
The Seagate 18 TB costs $39.56 per TB new on amazon.com. That is 9.1% above the TB index for internal 3.5-inch hard drives ($36.25 per TB). Among 79 new internal 3.5-inch hard drives it ranks number 9 by price per TB.
| Condition | Price | Price per TB | As of | Offer |
|---|---|---|---|---|
| Used | $575.00Oct 27, 2026, 9:17 PM UTC | $31.94 | Oct 27, 2026, 9:17 PM UTC | Amazon* |
| New | $712.00Oct 27, 2026, 9:17 PM UTC | $39.56 | Oct 27, 2026, 9:17 PM UTC | Amazon* |
Prices: cheapest offer per condition from all sellers on amazon.com (Amazon and marketplace sellers), excluding shipping, timestamp per row. At the top of its product page, Amazon often shows the featured offer from another seller, which can cost more. The button therefore opens the list of all offers. The price may have changed since the timestamp. If the Amazon app opens in another country's store, prices there differ: set the app to United States or open the link in your browser.
How has the price of the Seagate 18 TB changed?
Over the last 30 days the price stayed the same ($712.00). The 90-day low is $37.97 per TB ($683.40). It counts the lowest price that held for at least 2 days.
| Period | Change in price per TB |
|---|---|
| 7 days | ▲ 1.6 % |
| 14 days | 0.0 % |
| 30 days | 0.0 % |
| 90 days | ▼ 13.7 % |
Price archive since Jul 29, 2026, updated daily.
What are the specs of the Seagate 18 TB?
According to the Seagate data sheet, the Seagate 18 TB has CMR (conventional magnetic recording), 7,200 rpm and 256 MB cache. CMR suits RAID arrays and continuous operation.
| Spec | Value |
|---|---|
| Brand | Seagate |
| Series | Exos X18 |
| Part number | ST18000NM000J |
| ASIN | B08JV6PP9B |
| Capacity | 18 TB (18 × 10¹² Byte) |
| Form factor | 3.5" internal |
| Technology | HDD |
| Recording | CMR |
| Spindle speed | 7,200 rpm |
| Cache | 256 MB |
Source: Seagate data sheet
Frequently asked questions about the Seagate 18 TB
Is the Seagate 18 TB cheap right now?
The price per TB is 4.2% above the 90-day low of $37.97 and 9.1% above the TB index for its product type (as of Oct 27, 2026, 9:17 PM UTC).
Is the Seagate 18 TB CMR or SMR?
CMR, according to the Seagate data sheet.
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Prices: amazon.com, timestamp per row. Specs: manufacturer data sheet. Calculation: How the TB index works. All offers Internal 3.5".