18TB hard drive prices: cheapest 18TB offers by price per TB
18TB hard drive: the cheapest new offer on amazon.com right now is Seagate 18 TB for $712.00, which is $39.56 per TB. The median of the 3 new 18TB offers is $924.99 (as of Oct 28, 2026 at 1:17 AM UTC). The list below shows all 5 offers in this size with price, condition and price timestamp, sorted by price per TB.
90 days
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| Compare | Trend 30 days | Form factor | Technology | Condition | Product | Store | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| $27.78 | $499.99 | 18 TB | ▼ 3.0 % | $27.78 | n/a | 3.5" internal | HDD | UsedUsed | WD Purple 18 TB | |||
| $31.94 | $575.00 | 18 TB | ▲ 18.3 % | $23.33 | n/a | 3.5" internal | HDD | UsedUsed | Seagate 18 TB | |||
| $39.56 | $712.00 | 18 TB | ▲ 1.6 % | $37.97 | n/a | 3.5" internal | HDD | NewNew | Seagate 18 TB | |||
| $51.39 | $924.99 | 18 TB | 0.0 % | $41.41 | n/a | 3.5" internal | HDD | NewNew | Toshiba X300 PRO 18 TB | |||
| $60.50 | $1,089.00 | 18 TB | 0.0 % | $54.17 | n/a | 3.5" internal | HDD | NewNew | WD Purple 18 TB |
No offers match these filters.
How much does a 18TB internal hard drive cost?
A 18TB internal hard drive costs from $712.00 new on amazon.com. Half of the 3 new offers cost less than $924.99, the other half more. Per TB, that is from $39.56.
Price per TB is the total price divided by capacity, with 1 TB equal to 10^12 bytes. Shipping is not included. ratioDB checks prices regularly and shows on every offer when its price was last checked.
Which 18TB hard drive is cheapest per TB?
The cheapest per TB right now is Seagate 18 TB at $39.56 per TB. The table shows the 3 cheapest new 18TB offers.
Cheapest new 18TB offers on amazon.com, as of Oct 28, 2026 at 1:17 AM UTC
| Model | Price | Price per TB |
|---|---|---|
| Seagate 18 TB | $712.00 | $39.56 |
| Toshiba X300 PRO 18 TB | $924.99 | $51.39 |
| WD Purple 18 TB | $1,089.00 | $60.50 |
Check warranty and condition when you compare. Every row in the list shows whether an offer is new, renewed or used.
Is 18TB cheaper per TB than other sizes?
Not right now. The cheapest size per TB is 6 TB at $23.08 per TB for the cheapest new offer.
Cheapest new offer per size, internal hard drives on amazon.com, as of Oct 28, 2026 at 1:17 AM UTC
| Size | Cheapest new offer per TB | New offers |
|---|---|---|
| 1 TB | $53.89 | 23 |
| 2 TB | $49.48 | 9 |
| 4 TB | $42.49 | 19 |
| 6 TB | $23.08 | 8 |
| 8 TB | $33.00 | 7 |
| 10 TB | $40.00 | 4 |
| 12 TB | $39.17 | 5 |
| 14 TB | $44.79 | 4 |
| 16 TB | $43.42 | 2 |
| 18 TB | $39.56 | 3 |
| 24 TB | $79.17 | 1 |
Bigger models are not automatically cheaper per TB. Compare price per TB before you settle on a size.
Which 18TB hard drive fits a NAS or PC?
For a NAS (network attached storage) and 24/7 use, CMR drives are the better choice, for a PC a cheap desktop drive is often enough. Internal hard drives come in 3.5" for PCs and NAS and in 2.5" for laptops.
The difference between recording methods is explained in CMR vs SMR. Which models suit a NAS is covered in Best NAS hard drive. External models are listed under external hard drives.
How have 18TB hard drive prices developed?
The index for 18TB hard drive is at $51.39 per TB and has changed by +11.5% over 30 days. Its lowest value over the last 90 days is $41.41 per TB.
The index is the median of up to 10 cheapest new offers in this size per day. The percentages only compare offers that had a price on both days. The chart above shows the history day by day. Why hard drives have become more expensive is explained in Hard drive prices.
Is a renewed or used 18TB offer worth it?
There are 2 used offers from $27.78 per TB. New starts at $39.56 per TB. A used offer pays off mainly if it is clearly cheaper and comes with a warranty.
ratioDB never includes used or renewed offers in the index. What to watch for is covered in Refurbished hard drives.
18TB hard drive FAQ
How much does a 18TB internal hard drive cost right now?
New from $712.00 on amazon.com, which is $39.56 per TB (as of Oct 28, 2026 at 1:17 AM UTC). The median of the 3 new offers is $924.99.
How current are the prices?
ratioDB checks amazon.com prices regularly, usually several times a day. Every offer shows when its price was last checked. Amazon may have changed the price since.
Why does ratioDB show price per TB?
Price per TB makes different sizes and offers comparable. You see right away whether a 18TB offer is cheap or whether another size gets you more storage for the money.
Are used offers in the list?
Yes, the list shows new, renewed and used offers, every row labeled with its condition. The index and the values in the tables of this text use new offers only.