| £/TB | Price | Size | Tech | Form Factor | Condition | Description | Rating | Reviews | |
|---|---|---|---|---|---|---|---|---|---|
 | £34.80 | £417.63 | 12 TB | HDD | 3.5" | New | ★★★★★ 5.0 | 1 | |
 | £35.33 | £423.99 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.3 | 1,556 | |
 | £36.25 | £435.00 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.0 | 89 | |
 | £37.09 | £445.02 | 12 TB | HDD | 3.5" | New | ★★★★½ 4.6 | 8,564 | |
 | £39.59 | £475.02 | 12 TB | HDD | 3.5" | New | ★★★★½ 4.5 | 1,999 | |
 | £39.83 | £477.99 | 12 TB | HDD | 3.5" | New | ★★★★½ 4.5 | 500 | |
 | £39.90 | £478.77 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.3 | 1,471 | |
 | £39.90 | £478.77-0.3% 24h | 12 TB | HDD | 3.5" | New | ★★★★½ 4.6 | 434 | |
 | £41.25 | £494.99 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.1 | 215 | |
| £41.67 | £499.99 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.4 | 973 | |
| £41.67 | £499.99 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.3 | 283 | |
 | £42.32 | £507.87 | 12 TB | HDD | 3.5" | New | ★★★★½ 4.5 | 303 | |
 | £43.34 | £520.02 | 12 TB | HDD | 3.5" | New | ★★★★½ 4.6 | 1,026 | |
 | £45.50 | £545.99 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.4 | 5,244 | |
 | £46.67 | £559.99 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.0 | 10 | |
 | £48.08 | £576.90 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.1 | 733 | |
 | £52.94 | £635.22 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.0 | 1,821 | |
 | £54.17 | £650.00 | 12 TB | HDD | 3.5" | New | ★★★★★ 5.0 | 2 | |
 | £65.42 | £785.00 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.4 | 1,805 | |
 | £70.55 | £846.56 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.3 | 22,243 | |
 | £70.71 | £848.49 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.3 | 481 | |
 | £74.97 | £899.64 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.0 | 623 | |
 | £77.39 | £928.69 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.4 | 205 | |
 | £88.52 | £1,062.21 | 12 TB | HDD | 3.5" | New | ★★★★☆ 4.4 | 1,840 |
Choosing a 12TB NAS drive
Today the best value is HGST Ultrastar He12 at £417.63 (£34.80/TB). 12TB is the middle of the NAS range: enough for a media library in a two-bay mirror, or a large shared archive in a four- or five-bay RAID 5. The NAS lines (IronWolf, Red Plus/Pro, N300) and the enterprise drives (Exos, Toshiba MG, Ultrastar) overlap here, so compare the family table below on £/TB before settling on a brand.
- 2-bay, RAID 1 (mirror): 12TB usable from 2 × 12TB, about £835.26 in drives at today’s best price.
- 4-bay, RAID 5: 36TB usable from 4 × 12TB, about £1,670.52 in drives at today’s best price.
- 5-bay, RAID 5: 48TB usable from 5 × 12TB, about £2,088.15 in drives at today’s best price.
- 8-bay, RAID 6: 72TB usable from 8 × 12TB, about £3,341.04 in drives at today’s best price.
12TB NAS drives by family
| Family | Drives | Best £/TB | Best-value model |
|---|---|---|---|
| Seagate IronWolf Pro | 3 | £39.59/TB | Seagate 12TB IronWolf Pro Internal NAS Hard D |
| Seagate IronWolf | 4 | £35.33/TB | Seagate IronWolf ST12000VN0008 |
| WD Red Pro | 3 | £52.94/TB | WD Red Pro 12TB NAS 3.5" Internal Hard Drive |
| WD Red Plus | 3 | £39.83/TB | WD Red Plus 12TB NAS 3.5" Internal Hard Drive |
| Toshiba N300 | 5 | £39.90/TB | TOSHIBA N300 12TB NAS 3.5-Inch Internal Hard |
| Seagate Exos | 1 | £41.25/TB | Seagate Exos X14 12TB 7200 RPM SATA 6Gb/s 256 |
| Toshiba MG | 2 | £48.08/TB | Toshiba 12TB Enterprise Internal Hard Drive |
| WD Ultrastar | 2 | £34.80/TB | HGST Ultrastar He12 |
Buy drives from more than one batch when filling a multi-bay array, to cut the risk of two failing together. For the full picture see our NAS drive guide, SMR vs CMR and when to replace NAS drives, or compare every size on the NAS drive hub.
Frequently asked questions
How does disks.co.uk rank 12TB NAS drives?
We rank every 12TB NAS 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 12TB NAS drives right now?
The drive at the top of the table above is the cheapest of the 12TB NAS drives by £/TB today. At larger sizes the enterprise Exos, Toshiba MG and Ultrastar drives are often cheaper per terabyte than the NAS-branded lines; they are louder, but carry 5-year warranties.
Are all of these drives CMR?
The NAS-rated families listed here — IronWolf and IronWolf Pro, WD Red Plus and Red Pro, Toshiba N300 — and the enterprise drives all use conventional (CMR) recording. The one to watch is plain "WD Red" (no Plus or Pro) in the 2–6TB sizes, which is shingled (SMR) and a poor fit for RAID. See SMR vs CMR.
How many 12TB NAS drives do I need?
It depends on the bay count and RAID level: two drives in RAID 1 give you one drive's space with a full mirror; four in RAID 5 give three drives' worth and survive one failure. The section below works out usable space and cost at this size, and our NAS drive guide covers the choice in more detail.