Best 14TB NAS Drives UK 2026: Price per TB Ranked
14TB NAS-rated CMR drives by price per TB
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The best-value 14TB NAS drive is the Seagate Exos X16 (ST14000NM001G) at around £380.79, working out to roughly £27.20/TB at last check on 24 July 2026. It's a server-grade CMR drive with a 7,200RPM spindle and 256MB cache, and it comfortably undercuts every NAS-branded 14TB drive on this list. If you want a NAS-specific warranty and vibration tuning instead, the Seagate IronWolf Pro at £420.00 (£30.00/TB) is the more conventional balanced pick, while the WD Red Pro at £489.99 offers WD's ecosystem if you're already invested in it.
Best 14TB NAS drives
All eleven drives below are CMR (conventional magnetic recording), which is exactly what you want at 14TB, avoid anything SMR at this capacity for RAID use. Prices and £/TB are indicative as checked on 24 July 2026.
Which 14TB drive should you buy
Choose the Exos X16 if
- You want the lowest £/TB and don't need a NAS-vendor warranty package
- You're building a larger DIY array (Unraid, TrueNAS) where any CMR enterprise drive is fair game
- You're comfortable buying a drive designed for 24/7 datacentre use rather than a marketed 'NAS' drive
- You don't need Seagate's IronWolf Health Management or Rescue data recovery service
Choose IronWolf Pro or WD Red Pro if
- You want official NAS vendor support and a bundled rescue/warranty scheme
- You're filling a Synology or QNAP NAS and want vendor-listed compatibility
- You value the workload rating (300TB/year) and vibration sensors built for multi-bay chassis
- You're running 4+ bays and want manufacturer peace of mind over the last few pounds of saving
Who actually needs 14TB and CMR vs SMR
14TB sits in an odd spot for home NAS buyers. In a 2-bay unit it's overkill for most people unless you're archiving large media libraries or running Time Machine backups for several devices, where 8-10TB drives usually make more sense per bay. Where 14TB earns its keep is in 4-bay and larger NAS units, where two or four of these drives in RAID 5, RAID 6, or SHR give you a genuinely large, resilient pool: think 20-40TB of usable storage after redundancy, which suits photographers, small studios, Plex libraries running to tens of thousands of files, or anyone backing up multiple household PCs to one place.
The 14TB capacity band is precisely where SMR (shingled magnetic recording) drives used to sneak into NAS shopping baskets under NAS-sounding names, and it's worth being blunt: every drive on this list is CMR, and that's non-negotiable at this size. SMR drives write data in overlapping shingles, which tanks sustained write performance and, critically, makes RAID rebuilds dramatically slower and riskier because the drive struggles to keep up with the rebuild process's write demands. A rebuild that should take 12-18 hours can stretch into days on SMR, during which your array sits in a degraded, vulnerable state. All eleven drives here, from the budget Exos through to the Toshiba MG09, are confirmed CMR, so your decision is really about price, warranty, and workload rating rather than worrying about the recording technology.
A word on rebuild safety
Buying two or more 14TB drives from the exact same batch increases the (small but real) chance of correlated failures during a rebuild, since drives manufactured together tend to wear similarly. If your NAS has the bays, consider mixing purchase dates or even brands (for example, one Exos and one IronWolf Pro) for critical arrays, and always keep a separate backup outside the NAS itself. RAID is not a backup, it protects against drive failure, not against fire, theft, ransomware, or you accidentally deleting the wrong folder.
14TB NAS drives, by price per TB
Prices are indicative — last checked 8 September 2026, from Amazon.co.uk. They are not live; check the current price on Amazon before buying. Best £/TB is the lowest at last check.
Frequently asked questions
Is the Seagate Exos X16 safe to use in a home NAS like Synology or QNAP?
Yes. It's a SATA CMR drive with standard 3.5-inch dimensions, so it'll physically and electrically work in any NAS bay. It lacks the NAS-specific firmware tuning and bundled rescue service that IronWolf Pro or WD Red Pro offer, but plenty of enthusiasts run Exos drives in home NAS units for the better £/TB with no issues.
What's the difference between IronWolf and IronWolf Pro at 14TB?
IronWolf Pro (ST14000NE0008) adds a longer warranty, a higher workload rating, and Seagate's Rescue data recovery service compared with the standard IronWolf (ST14000VN0008). At 14TB the price gap is small, around £5-15 at last check, so Pro is usually the sensible choice unless you're on a tight budget.
Should I avoid the Toshiba MG09 and N300 Pro given their higher £/TB?
Not necessarily avoid, but understand why they cost more. The MG09 is a helium-filled enterprise drive rated for heavier sustained workloads, and the N300 Pro targets large business NAS units up to 24 bays. For a typical 2-6 bay home or small office NAS, you're paying a premium for capability you likely won't use, so the Exos, IronWolf, or WD Red Pro tiers make more financial sense.
How many 14TB drives do I need for a useful RAID pool?
In a 4-bay NAS running RAID 5 or SHR with three 14TB drives, you'd get roughly 28TB usable after one drive's worth of redundancy. Four drives in RAID 6 gives around 28TB usable with two-drive fault tolerance, which is the safer option for arrays you can't afford to lose.
Is 14TB the best £/TB capacity right now, or should I look at other sizes?
At last check on 24 July 2026, 14TB via the Exos X16 at £27.20/TB is competitive, but larger capacities like 16TB or 18TB sometimes edge ahead on pure £/TB while needing fewer bays for the same pool size. If your NAS has spare bays and you want lower cost per drive, 14TB remains a sensible middle ground between price and per-bay capacity.