UnionSine 500 GB: price per TB and price history
Part number HD3513-500GBASIN B0H9RTLGXLBrand UnionSineExternal 2.5"
The UnionSine 500 GB (HD3513-500GB) is an external 2.5-inch hard drive by UnionSine. On amazon.com it costs $36.99 new, which is $73.98 per TB (as of Oct 27, 2026, 9:44 PM UTC). The TB index for external 2.5-inch hard drives is $47.50 per TB.
Price per TB, New
Total $36.99 for 500 GB, cheapest new offer, excl. shipping
- 1 day
- 0.0 %
- 7 days
- 0.0 %
- 30 days
- 0.0 %
- 90-day low
- 73.98
90 days
How much does the UnionSine 500 GB cost per TB?
The UnionSine 500 GB costs $73.98 per TB new on amazon.com. That is 55.8% above the TB index for external 2.5-inch hard drives ($47.50 per TB). Among 66 new external 2.5-inch hard drives it ranks number 43 by price per TB.
| Condition | Price | Price per TB | As of | Offer |
|---|---|---|---|---|
| New | $36.99Oct 27, 2026, 9:44 PM UTC | $73.98 | Oct 27, 2026, 9:44 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 UnionSine 500 GB changed?
Over the last 30 days the price stayed the same ($36.99). The 90-day low is $73.98 per TB ($36.99). It counts the lowest price that held for at least 2 days.
| Period | Change in price per TB |
|---|---|
| 7 days | 0.0 % |
| 14 days | 0.0 % |
| 30 days | 0.0 % |
| 90 days | n/a |
Price archive since Aug 12, 2026, updated daily.
What are the specs of the UnionSine 500 GB?
According to the listing, the UnionSine 500 GB has 500 GB of capacity, form factor 2.5" external.
| Spec | Value |
|---|---|
| Brand | UnionSine |
| Part number | HD3513-500GB |
| ASIN | B0H9RTLGXL |
| Capacity | 500 GB |
| Form factor | 2.5" external |
| Technology | HDD |
What are the alternatives to the UnionSine 500 GB?
At 500 GB, the Caraele Storage 500 GB (Caraele-500GB) costs $59.98 per TB.
| Product | Capacity | Price per TB |
|---|---|---|
| Caraele Storage 500 GB | 500 GB | $59.98 |
| Caraele Ultra Slim Storage 500 GB | 500 GB | $59.98 |
| Tianken Ultra Slim Storage 500 GB | 500 GB | $61.98 |
| Kosbees Drives,Portable 500 GB | 500 GB | $67.98 |
Frequently asked questions about the UnionSine 500 GB
Is the UnionSine 500 GB cheap right now?
The price per TB is at its 90-day low of $73.98 per TB and 55.8% above the TB index for its product type (as of Oct 27, 2026, 9:44 PM UTC).
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Prices: amazon.com, timestamp per row. Specs: manufacturer data sheet. Calculation: How the TB index works. All offers External 2.5".