Seagate Expansion 4 TB: price per TB and price history
Part number STKP4000400ASIN B093BVXYSVBrand SeagateExternal 3.5"
The Seagate Expansion 4 TB (STKP4000400) is an external 3.5-inch hard drive by Seagate. On amazon.com it costs $175.00 new, which is $43.75 per TB (as of Oct 28, 2026, 12:30 AM UTC). The TB index for external 3.5-inch hard drives is $42.62 per TB.
Price per TB, New
Total $175.00 for 4 TB, cheapest new offer, excl. shipping
- 1 day
- 0.0 %
- 7 days
- ▲ 1.3 %
- 30 days
- 0.0 %
- 90-day low
- 41.97
90 days
How much does the Seagate Expansion 4 TB cost per TB?
The Seagate Expansion 4 TB costs $43.75 per TB new on amazon.com. That is 2.6% above the TB index for external 3.5-inch hard drives ($42.62 per TB). Among 6 new external 3.5-inch hard drives it ranks number 4 by price per TB.
| Condition | Price | Price per TB | As of | Offer |
|---|---|---|---|---|
| New | $175.00Oct 28, 2026, 12:30 AM UTC | $43.75 | Oct 28, 2026, 12:30 AM 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 Expansion 4 TB changed?
Over the last 30 days the price stayed the same ($175.00). The 90-day low is $41.97 per TB ($167.87). It counts the lowest price that held for at least 2 days.
| Period | Change in price per TB |
|---|---|
| 7 days | ▲ 1.3 % |
| 14 days | ▲ 4.2 % |
| 30 days | 0.0 % |
| 90 days | ▼ 2.8 % |
Price archive since Jul 30, 2026, updated daily.
What are the specs of the Seagate Expansion 4 TB?
According to the listing, the Seagate Expansion 4 TB has 4 TB of capacity, form factor 3.5" external.
| Spec | Value |
|---|---|
| Brand | Seagate |
| Part number | STKP4000400 |
| ASIN | B093BVXYSV |
| Capacity | 4 TB (4 × 10¹² Byte) |
| Form factor | 3.5" external |
| Technology | HDD |
What are the alternatives to the Seagate Expansion 4 TB?
In the same series, the Seagate Expansion 8 TB (STNP8000400) is cheaper at $35.00 per TB.
| Product | Capacity | Price per TB |
|---|---|---|
| Seagate Expansion 6 TB | 6 TB | $36.50 |
| Seagate Expansion 8 TB | 8 TB | $35.00 |
Frequently asked questions about the Seagate Expansion 4 TB
Is the Seagate Expansion 4 TB cheap right now?
The price per TB is 4.2% above the 90-day low of $41.97 and 2.6% above the TB index for its product type (as of Oct 28, 2026, 12:30 AM UTC).
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Prices: amazon.com, timestamp per row. Specs: manufacturer data sheet. Calculation: How the TB index works. All offers External 3.5".