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EnglishHow the Price-per-TB Comparison on Terabyte Deals Works
Updated
Terabyte Deals ranks storage listings by $/TB — the total price divided by the drive's capacity in terabytes. That single number lets you compare a 2 TB drive against a 14 TB drive on equal footing, which raw prices can't do. It's most useful when you're shopping for bulk capacity (internal HDDs, in particular) and least useful when you care about speed, form factor, or warranty more than cost per unit of space.
The formula
$/TB = total price ÷ capacity in TB
A 3 TB drive listed at $52.05 works out to $17.35/TB. A 14 TB drive at $329.99 works out to $23.57/TB. Even though the 14 TB drive costs six times more at checkout, the 3 TB drive is the cheaper storage per terabyte.
How to read the table
The listing table on Terabyte Deals sorts by $/TB ascending by default, so the cheapest-per-terabyte options sit at the top. Each row also carries the attributes you need to filter before the $/TB ranking is meaningful:
| Column | What it tells you |
|---|---|
| $/TB | Unit cost — the primary sort key |
| Price | Actual checkout price |
| Capacity | Drive size in TB |
| Location | Internal or external |
| Type | HDD, SSD, or flash |
| I/O | Interface (SATA, SAS, etc.) |
| Form | Physical size (3.5", 2.5", etc.) |
| Speed Class | Performance tier where applicable |
| Brand | Manufacturer |
| Condition | New or renewed/refurbished |
| Product | Full listing name |
Why $/TB alone can mislead
The top of the $/TB ranking in the current data is dominated by renewed 2 TB and 3 TB SAS drives at roughly $17–$24/TB. That's a real signal about cost, but it comes with conditions the $/TB number doesn't capture:
- Condition. Nearly every low-$/TB entry is marked "Renewed" or "Certified Refurbished." A new drive of the same capacity typically costs more per TB.
- Interface. SAS drives dominate the cheap end. SAS requires a compatible controller — it won't plug into a standard consumer SATA port.
- Form factor. These are 3.5" internal drives, not portable or laptop-friendly.
- Warranty and age. Renewed enterprise drives may carry shorter or third-party warranties; the $/TB figure says nothing about remaining service life.
So the ranking answers "what's the cheapest space per terabyte," not "what's the best drive for my build."
A practical workflow
- Filter first, sort second. Narrow by Type, Form, I/O, and Condition to match your system. A SAS 3.5" drive is useless in a laptop regardless of its $/TB.
- Then read the $/TB column top-down. Within your filtered set, the lowest $/TB is your best cost-per-space option.
- Sanity-check against Price and Capacity. A very low $/TB on a small drive may not be worth it if you need 10 TB+ and would have to buy several units.
- Confirm the listing. Click through to the product to verify condition, warranty, and seller before buying.
When $/TB is the right metric — and when it isn't
Use it when: you're buying capacity in bulk (NAS, server, backup arrays), comparing drives of different sizes, or hunting the cheapest storage per unit.
Don't rely on it alone when: you need speed (SSDs and flash trade $/TB for performance), a specific interface or form factor, a new-with-warranty drive, or a portable/external unit. In those cases, filter to your requirements first, then use $/TB only to break ties within that set.