Best 8TB NAS Drives UK 2026: Top Picks by Price per TB
8TB NAS-rated CMR drives by price per TB
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The best-value 8TB NAS-rated CMR drive at last check (24 July 2026) is the Seagate IronWolf 8TB (ST8000VN004) at around £303.98, working out to £38.00/TB. It's the cheapest genuinely NAS-rated CMR drive on the list, built for 1-8 bay NAS use with the vibration tolerance and workload rating your enclosure needs. Cheaper drives per TB exist on this list, but they're either an enterprise-only SATA drive without NAS firmware or a surveillance-specific model, neither of which is the right fit for a multi-bay NAS running RAID day in, day out.
Best 8TB NAS drives
All three picks here are genuine CMR drives with NAS or enterprise firmware, ruling out anything SMR-based. Prices and £/TB are as listed at last check on 24 July 2026.
Which 8TB drive should you buy
Choose the IronWolf 8TB if
- You've got a 1-4 bay home or small office NAS and want the lowest genuine £/TB on a CMR NAS drive
- Your workload is mostly media serving, backups and general file storage rather than constant heavy writes
- You want IronWolf Health Management and Seagate's rescue service included as standard
- You're building a RAID 1 or RAID 5 array and need drives designed for that vibration and duty cycle, not desktop drives
Choose the WD Red Pro or Exos if
- You're running 5+ bays or a business NAS where the higher 7,200rpm speed and stronger vibration tolerance earn their keep
- You want the longer 5-year warranty that WD Red Pro and Seagate Exos carry over IronWolf's 3-year cover
- You run demanding multi-user workloads, virtualisation, or near-continuous read/write and want an enterprise duty cycle rating
- You'd rather pay a little more per TB now than risk a marginal drive struggling during a RAID rebuild
Who actually needs 8TB, and CMR vs SMR at this capacity
8TB sits in an awkward but useful spot. It's too small to be a serious archive tier for anyone running Plex libraries, photo backups and multiple users on a 4-bay or larger NAS, but it's a sensible single-drive size for a 1-2 bay unit, or as the building block for a RAID 5/6 array where you're stacking four or more drives to get to 16-24TB usable. If you've got a 2-bay Synology or QNAP and want mirrored redundancy without overspending, two 8TB drives in RAID 1 giving you 8TB usable is a solid, unglamorous choice. For anything bigger, work out your target pool size first, then decide whether 8TB, 12TB or higher gets you there most cheaply per TB, because larger drives sometimes beat 8TB on pure £/TB even though the upfront cost per drive is higher.
The 8TB capacity point is exactly where SMR (shingled magnetic recording) drives used to hide in mainstream ranges, and while manufacturers have mostly cleaned up their NAS-branded lines, it's still worth checking explicitly. Every drive on this list is CMR (conventional magnetic recording), which is the only sensible choice for RAID. SMR drives write data in overlapping shingled tracks that dramatically slow down rewrites and, critically, cause serious problems during RAID rebuilds, sometimes stalling or timing out and dropping out of the array entirely. If you're comparing this list against drives you find elsewhere at a lower price, always confirm CMR in the spec sheet, not just the marketing name, because 'NAS-ready' branding alone doesn't guarantee it.
A word on RAID rebuild risk at 8TB
Rebuilding a RAID 5 or RAID 6 array after a drive failure is the most stressful period for your remaining disks: hours of continuous, intensive reads across every surviving drive. At 8TB per disk, a rebuild can take the best part of a day, longer on slower 5,400rpm drives like the IronWolf 8TB compared with 7,200rpm options such as the WD Red Pro or Exos. This isn't a reason to avoid the cheaper drive, but it is a reason to keep backups current and consider RAID 6 or an equivalent scheme with two-drive redundancy if you're running four or more bays, since a second failure during a lengthy rebuild is the scenario that actually loses data.
8TB 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 8TB per drive enough for a 4-bay NAS in 2026?
For RAID 5 across four 8TB drives you'd get roughly 24TB usable, which is comfortable for most home and small business use, but if you're already filling a similar-sized NAS today, consider 10TB or larger drives instead so you're not immediately capacity-constrained.
Why is the Seagate Exos 7E8 6TB more expensive per TB than the 8TB IronWolf?
The Exos range is enterprise-grade with SATA and SAS options built for data centre duty cycles and higher MTBF ratings, and the 6TB model on this list simply carries less capacity for a similar drive cost, pushing its £/TB above the 8TB NAS drives.
Should I use the Seagate SkyHawk 8TB in my NAS instead of an IronWolf?
No. SkyHawk is tuned for surveillance DVR/NVR workloads with different firmware optimised for continuous video streams from multiple cameras, not general NAS file serving or RAID rebuild behaviour, so it's not the right choice here even though it's CMR.
What's the real difference between IronWolf and IronWolf Pro at 8TB?
IronWolf Pro runs at 7,200rpm with a higher workload rating and longer warranty aimed at business NAS use, while the standard IronWolf spins at 5,400rpm and suits lighter home or small office workloads at a lower cost per TB.
Can I mix an Exos drive with WD Red drives in the same NAS?
Technically yes if capacities match, but it's not advisable long-term because different rotational speeds and vibration tolerances can affect array performance and consistency; it's better to match drive families within the same array.