| £/TB | Price | Size | Tech | Form Factor | Condition | Description | Rating | Reviews | |
|---|---|---|---|---|---|---|---|---|---|
 | £22.17 | £399.00 | 18 TB | HDD | External | New | ★★★★☆ 4.2 | 7,506 | |
 | £22.51 | £405.18 | 18 TB | HDD | External | Warehouse | ★★★★½ 4.6 | 19,815 | |
 | £34.17 | £615.00 | 18 TB | HDD | 3.5" | Renewed | ★★★★☆ 4.2 | 122 | |
 | £34.55 | £621.90-1.3% 24h | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.2 | 200 | |
 | £34.72 | £625.00 | 18 TB | HDD | 3.5" | Renewed | ★★★★☆ 4.2 | 124 | |
 | £35.56 | £640.00 | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.0 | 679 | |
 | £38.06 | £684.99 | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.3 | 283 | |
 | £38.06 | £684.99 | 18 TB | HDD | 3.5" | New | ★★★★½ 4.5 | 49 | |
 | £45.77 | £823.81-8.2% 24h | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.0 | 1,821 | |
 | £49.23 | £886.08 | 18 TB | HDD | External | New | ★★★★☆ 4.1 | 48 | |
 | £49.99 | £899.88 | 18 TB | HDD | 3.5" | New | ★★★★½ 4.6 | 79 | |
 | £51.30 | £923.45 | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.1 | 181 | |
 | £53.48 | £962.55 | 18 TB | HDD | External | New | ★★★★☆ 4.3 | 674 | |
 | £53.95 | £971.15-0.2% 24h | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.2 | 454 | |
 | £55.70 | £1,002.58 | 18 TB | HDD | 3.5" | New | ★★★★☆ 4.4 | 2,243 | |
 | £56.41 | £1,015.46 | 18 TB | HDD | External | New | ★★★★☆ 4.4 | 11,263 | |
 | £190.76 | £3,433.69 | 18 TB | HDD | External | New | ★★★★☆ 4.1 | 24 |
18TB drives: large-scale storage, strong £/TB
18TB is squarely enterprise/NAS territory, and — like 16TB — often shows excellent value once Renewed stock is in the mix. The table above ranks every 18TB drive by real cost per terabyte.
- Renewed enterprise (Seagate Exos, WD Ultrastar): the usual source of the very lowest £/TB at this size — read what to check on arrival in our renewed drives guide.
- NAS: a capacity aimed at multi-bay arrays with room to grow, rather than a single-drive desktop upgrade.
- New desktop/external: exists at this size too, for buyers prioritising a full manufacturer warranty.
Compare against 16TB and 20TB — at this scale a small price difference can flip which size is genuinely the best value.
Frequently asked questions
How does disks.co.uk rank 18TB drives?
We rank every 18TB drives by real cost per terabyte (£/TB) — the live Amazon.co.uk price divided by capacity — so the best value appears at the top. Prices refresh several times a day from Keepa, with 24-hour movement and all-time-low flags.
What is the cheapest 18TB drives drive right now?
The drive at the top of the table above is the cheapest 18TB drives option by £/TB at the moment. Larger capacities usually cost less per terabyte, so it is worth comparing 18TB drives against the next size up before you buy.
Is a 18TB drives drive good value?
Value depends on £/TB, not the sticker price. Use the ranking above to compare, and open any drive for its full Keepa price history to check whether today's price is genuinely low.
What is a 18TB drives drive good for?
It comes down to how much you store — see our storage sizing guide. As a rule, buy one size up if the £/TB is similar, so you do not run out sooner.