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Best NAS for 40 TB for United Kingdom

A long-term NAS with 40 TB usable capacity, parity redundancy and room to grow. Prices and availability for United Kingdom.

Recommended build

Value build — most for your money

Architecture: tower build on LGA 1700 + Intel Z790

≈ €2,322

Total

  • CPU threads4
  • RAM44 GB
  • Storage64 TB
  • GPUnone
Performance
100
Value
68
Efficiency
69
Expandability
100
Silence
95
Longevity
100
Reliability
75
Overall
79
Idle
40 W
Typical
64 W
Peak
109 W
Energy / year
≈ €190

Assessmentbalanced

Parts & prices

  • cpu

    Intel Core i3 14100

    4C/8T · 4.7 GHz · 60 W

    €164
  • motherboard

    Gigabyte Z790 AORUS ELITE AX DDR4 ATX

    Intel Z790 · ATX · 3× M.2

    ≈ €139est.
  • ram

    Corsair Vengeance LPX Black DDR4-4000 CL18 64GB (2x32GB)

    64 GB DDR4 · 4000 MT/s

    ≈ €137est.
  • case

    KOLINK Observatory HF Mesh ARGB ATX Mid Tower White Tempered Glass

    ATX/MATX/ITX · 4× 3.5″

    €45
  • cooling

    Thermalright Le Grand Macho Air 159mm Fanless

    passive · 150 W TDP

    ≈ €35est.
  • psu

    be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black

    1000 W · titanium · modular

    €96
  • storage

    Rocket Q NVMe SSD

    NVME · 8 TB

    €122
  • storage×2

    Seagate Exos M 36TB 3.5" HDD 7200RPM SATA 6.0 Gb/s

    3.5 HDD · 36 TB

    ≈ €1,584est.
Total≈ €2,322

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The verdict

Based on your goals you need roughly 4 CPU threads, 44GB RAM and 64TB of storage. This system runs 24/7, so energy matters. Recommended: the Value build — most for your money — 2322€ purchase, ~40W idle, ~190€/year energy (≈571€ over 3 years). Intel Core i3 14100: 8 threads covers the 4 needed with headroom. Motherboard Intel Z790 (LGA 1700): matches the CPU socket and case size. RAM: 64GB DDR4 — meets the 44GB the workload requires. Chose Intel Core i3 14100 over Intel Core i3 14100F: better overall fit for your priorities. Build DNA: performance 100, value 68, efficiency 69, expandability 100, silence 95, longevity 100 — overall 79/100. Heads-up: Requested 10000 Mbps but board Intel Z790 has max 2500 Mbps onboard and no free PCIe slot — staying on onboard networking. Add a board with a free slot for 2.5G/10G. Total (2322€) exceeds your budget (1400€) by 922€ (66%). Ranking already prefers in-budget variants — this one is shown for comparison; check the value variant or raise the budget. What limits you first: storage. Alternatives: Smart build — best all-round — 2522€, DNA 91/100, balanced · Long-term build — expandable & future-proof — 2522€, DNA 91/100, balanced.

Why this build

  • Intel Core i3 14100: 8 threads covers the 4 needed with headroom.
  • Motherboard Intel Z790 (LGA 1700): matches the CPU socket and case size.
  • RAM: 64GB DDR4 — meets the 44GB the workload requires.
  • Chose Intel Core i3 14100 over Intel Core i3 14100F: better overall fit for your priorities.

Who should choose it

  • The lowest total price (2322€) that still covers this workload properly — best price/quality ratio.

Why not the alternative

  • Value build — most for your money beats "Smart build — best all-round" on longevity +5 — that is why it is recommended for your priorities.
  • Value build — most for your money beats "Long-term build — expandable & future-proof" on longevity +5 — that is why it is recommended for your priorities.

What it sacrifices

  • No ECC memory — fine for home use, less ideal for bit-rot-sensitive archives.
  • Expansion headroom is trimmed: parts are chosen for price per capability.

System blueprint

The system as a whole — before the shopping list.

diy · tower build on LGA 1700 + Intel Z790

System blueprint

The system as a whole — before the shopping list.

Mission

  • File storage· primary · 2 users
  • Backup· primary · 1 users
  • Photo storage· secondary · 1 users
  • 10GbE network· secondary · 1 users

Constraints

Budget
€1,400
Storage
40 TB (parity 1)
Energy priority
4/10
Noise priority
3/10
Expansion priority
10/10

Recommended architecture

diy · tower build on LGA 1700 + Intel Z790

Compute
Intel Core i3 14100
Memory
Corsair Vengeance LPX Black DDR4-4000 CL18 64GB (2x32GB)
Storage
Rocket Q NVMe SSD, Seagate Exos M 36TB 3.5" HDD 7200RPM SATA 6.0 Gb/s
Networking
2.5G onboard
Cooling
Thermalright Le Grand Macho Air 159mm Fanless
Power
be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black
Expansion
2× PCIe, 2× M.2, 2× SATA, 2 bay, 2× RAM

What am I actually paying for?

We split your build into the performance you need, the performance you're buying, and the performance you're likely to use day-to-day. When the gap is wide, you're overbuying.

BALANCED — the build is sized close to what the workload requires.

BALANCED — the build is sized close to what the workload requires.

Performance I needPerformance I buyLikely to use
CPU threadsoverbuy482
RAM446428
Storage648064
GPU VRAM
Network10.0G1.0G10.0G

What this means

  • The build is sized close to what the workload requires.

Scoring & Risk

An explainable future-proof score, the Homelab Risk Score, a final pre-purchase audit and what will become the limiting factor over time.

79Low risk2

Future-proof score

Strong future-proofing

79

Strong future-proofing (79/100) — this build should stay relevant for years without major surgery.

Upgrade path75

DIY build — the CPU, motherboard and PSU can each be upgraded independently without replacing the whole system.

Expansion92

Expansion headroom: 2 PCIe slot(s), 2 M.2, 2 SATA, 2 drive bay(s), 2 RAM slot(s) free.

Storage growth70

Storage is 80% utilized with 2 free drive bay(s) and 2 free SATA port(s).

Memory growth75

2 RAM slot(s) free; memory is 69% utilized.

Networking80

Networking is 2500 Mbps, and a free PCIe slot can add a faster NIC later.

Replacement ease90

ATX form factor with standard, socketed components — most parts are easy to replace.

Workload change70

No GPU, but there is room (2 PCIe slot(s), PSU headroom 9.2x) to add one for AI/transcoding.

Homelab Risk Score

Low risk

22

Low risk (22/100) — sensible redundancy and headroom; no single point of failure is exposed.

Single point of failure

Risk: low

Storage has redundancy (parity1) — a single drive failure does not take the array down.

Fix: Continue a 3-2-1 backup strategy; redundancy is not a backup.

Storage risk

Risk: medium

2 desktop hard drive(s) — not rated for 24/7 duty, vibration or heat; higher long-run failure risk.

Fix: For an always-on system, prefer NAS/CMR-rated drives; monitor SMART and replace before the warranty ends.

Data loss risk

Risk: low

Redundancy protects against drive failure, though it is not a substitute for backups.

Fix: Follow a 3-2-1 backup rule: at least one copy off the box.

Power risk

Risk: low

PSU is 1000W, peak load 109W (11%).

Fix: PSU sizing leaves healthy headroom for spikes and future parts.

Network risk

Risk: critical

The workload wants 10000 Mbps but the config only provides 2500 Mbps.

Fix: Add a 10G NIC or upgrade the platform.

Expansion risk

Risk: low

2 PCIe, 2 M.2, 2 SATA, 2 bays free.

Fix: Healthy room for future drives, NICs and accelerators.

Upgrade risk

Risk: low

2024 platform — current generation with a forward-looking socket/feature set.

Fix: Buy for the workload, not the socket — upgrade paths are a bonus, not a guarantee.

Final build audit

Audit found 1 critical and 1 warning item(s) worth fixing before you buy.

1 Critical1 Warning1 Optimization2 Optional3 Future

Check the balance

Critical

Total (2322€) exceeds your budget (1400€) by 922€ (66%). Ranking already prefers in-budget variants — this one is shown for comparison; check the value variant or raise the budget.

Action: Reconsider the config for the stated workload or budget before buying.

Category: balance

Review

Warning

Requested 10000 Mbps but board Intel Z790 has max 2500 Mbps onboard and no free PCIe slot — staying on onboard networking. Add a board with a free slot for 2.5G/10G.

Action: Weigh this trade-off against your priorities.

Category: balance

Use NAS-rated drives

Optimization

Desktop drives in an always-on NAS/server role have higher long-run failure rates.

Action: Prefer NAS/CMR-rated drives for 24/7 duty.

Category: storage

Add a UPS

Optional

An always-on server holding data should survive power blips.

Action: Add an online/line-interactive UPS sized to the build's idle draw.

Category: power

Keep a backup off-box

Optional

Redundancy inside the box does not survive fire, theft or a whole-array fault.

Action: Mirror the important data to an external drive, a second box, or cloud.

Category: storage

RAM expansion available

Future

2 RAM slot(s) free for a later upgrade.

Action: Leave them free until the workload actually grows.

Category: memory

Drive bays remain

Future

2 drive bay(s) free for future capacity.

Action: Expand capacity in pairs (mirror/parity) when needed.

Category: storage

PCIe slot available

Future

2 free PCIe slot(s) for a NIC, HBA or GPU later.

Action: Use it for a 10G NIC, extra HBA, or an accelerator when the need appears.

Category: expansion

What becomes the limit

Storage nearly full is the most likely thing to date this build within 1-2y.

Horizon: 1-2y

Storage nearly full

Why: 80% of raw capacity is already in use — media libraries and backups grow fast.

What to do: Expanding is easy: add a drive to the free bays/ports.

What limits you first

storage is the closest to its limit (80% of capacity in use) — it will likely force the next upgrade.

Smart next upgrades

  1. 1Upgrade ram to G.Skill Trident Z Royal Silver DDR4-3200 CL14 128GB (4x32GB)
  2. 2Upgrade cpu to Intel Core i5 14500T OEM/Tray
  3. 3Upgrade storage to Western Digital Purple Pro 12TB HDD 3.5" SATA

Other builds to consider

Runner-up variants the engine generated for the same scenario — tap one to see its parts.

Smart build — best all-round

tower build on LGA 1851 + Intel B860 · Idle 40 W · balanced

≈ €2,522

Idle
40 W
Typical
66 W
Energy / year
≈ €197
RoleComponentQtyPriceBuy
cpuIntel Core Ultra 5 225F1€178
motherboardMSI PRO B860M-A WIFI LGA1851 DDR5 Micro-ATX1€149
ramKingston FURY White DDR5-5600 CL40 64GB (2x32GB)1≈ €220
caseTRYX FLOVA F50 Black1€138
coolingThermalright Le Grand Macho Air 159mm Fanless1≈ €35
psube quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black1€96
storageRocket Q NVMe SSD1€122
storageSeagate Exos M 36TB 3.5" HDD 7200RPM SATA 6.0 Gb/s2≈ €1,584
Total:≈ €2,522

Long-term build — expandable & future-proof

tower build on LGA 1851 + Intel B860 · Idle 40 W · balanced

≈ €2,522

Idle
40 W
Typical
66 W
Energy / year
≈ €197
RoleComponentQtyPriceBuy
cpuIntel Core Ultra 5 225F1€178
motherboardMSI PRO B860M-A WIFI LGA1851 DDR5 Micro-ATX1€149
ramKingston FURY White DDR5-5600 CL40 64GB (2x32GB)1≈ €220
caseTRYX FLOVA F50 Black1€138
coolingThermalright Le Grand Macho Air 159mm Fanless1≈ €35
psube quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black1€96
storageRocket Q NVMe SSD1€122
storageSeagate Exos M 36TB 3.5" HDD 7200RPM SATA 6.0 Gb/s2≈ €1,584
Total:≈ €2,522

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