Best SSDs for Mini PCs (2026) — M.2 NVMe & SATA Picks
Storage is the easiest component to upgrade on a mini PC. Most come with 256GB, which feels tight if you install large games or store media locally. Expanding to 512GB or 1TB costs £30-100 and transforms your storage experience.
This guide covers NVMe Gen 4/5, SATA SSDs, and expansion options. We’ll explain what form factors fit what machines and which brands offer the best value.
Mini PC SSD Form Factors
M.2 2280 NVMe: Most common in mini PCs. 22mm wide, 80mm long. Fast (3000-7000 MB/s read speed). Check your mini PC specs — most support this.
M.2 2242 NVMe: Smaller variant (22mm wide, 42mm long). Some mini PCs use this for space savings. Less common than 2280 but supported by most modern units.
2.5″ SATA SSD: Older standard, slower than NVMe but still capable. Some mini PCs have a 2.5″ bay for secondary storage. Getting rarer as NVMe prices drop.
USB 3.1 external SSD: Not installed internally, but excellent for external storage. Useful if your mini PC doesn’t have expansion slots.
Quick Picks: Best Mini PC SSDs
| Category | Model | Form Factor | Speed | Capacity | Price |
|---|---|---|---|---|---|
| NVMe Gen 4 (Best for most) | Samsung 990 Pro | M.2 2280 | 7100 MB/s | 1TB | ~£100 |
| WD Black SN850X | M.2 2280 | 7100 MB/s | 1TB | ~£80 | |
| NVMe Gen 4 (Budget) | Crucial P3 Plus | M.2 2280 | 5100 MB/s | 1TB | ~£50 |
| WD Blue SN580 | M.2 2280 | 4150 MB/s | 1TB | ~£45 | |
| NVMe Gen 5 | Samsung 990 EVO Plus | M.2 2280 | 5000 MB/s | 1TB | ~£90 |
| 2.5″ SATA (if available) | Samsung 870 EVO | 2.5″ SATA | 550 MB/s | 1TB | ~£60 |
| Crucial MX500 | 2.5″ SATA | 560 MB/s | 1TB | ~£55 | |
| M.2 2242 (compact) | WD SN740 | M.2 2242 | 3150 MB/s | 512GB | ~£40 |
| External USB | Samsung T5 | USB 3.1 | 550 MB/s | 1TB | ~£80 |
NVMe Gen 4: Best Overall Performance (£45-100 for 1TB)
Premium: Samsung 990 Pro (£100 for 1TB)
The Samsung 990 Pro is the current performance flagship for NVMe Gen 4. Sequential reads hit 7100 MB/s, which is essentially peak performance for PCIE 4.0. This is the fastest consumer SSD available.
Why buy it: If you work with large files (video editing, photo libraries), the speed difference is noticeable. File copying, application loading, and system responsiveness all benefit. Samsung’s reputation is excellent.
Realistic note: For office work, gaming, and normal use, you won’t notice the difference between 990 Pro (7100 MB/s) and a budget option (4000 MB/s). The speed advantage matters only for professional workflows.
Warranty: 5 years. Samsung backing is excellent.
View Samsung 990 Pro on Amazon UK
Balanced: WD Black SN850X (£80 for 1TB)
The WD Black SN850X matches the 990 Pro on speed (7100 MB/s) at a lower price point. Identical performance, slightly lower cost. This is the better value if you want peak Gen 4 speed without the Samsung premium.
Why buy it: Same performance as 990 Pro for £20 less. Western Digital’s reliability is excellent. Support is strong.
Available capacities: 500GB (~£50), 1TB (~£80), 2TB (~£150).
View WD Black SN850X on Amazon UK
Budget Gen 4: Crucial P3 Plus (£50 for 1TB)
The Crucial P3 Plus is the best value NVMe Gen 4 SSD. Reads at 5100 MB/s (slower than premium options, but still Gen 4 speeds). Costs half the price of the 990 Pro.
Why buy it: Excellent value. Speed is perfectly adequate for gaming, office work, and general computing. Crucial’s reliability is proven across millions of units. Warranty is 5 years.
Real-world impact: You’ll notice zero performance difference in typical use compared to 7100 MB/s options. The 2000 MB/s speed difference translates to maybe 1-2 seconds faster file copying. Not worth paying double for unless you work with large files professionally.
View Crucial P3 Plus on Amazon UK
Extreme Budget Gen 4: WD Blue SN580 (£45 for 1TB)
The WD Blue SN580 is the absolute cheapest NVMe option that’s still respectable. 4150 MB/s is slower than other Gen 4 drives, but still dramatically faster than SATA. Price is unbeatable.
Why buy it: If you’re upgrading from 256GB to 1TB and budget is tight, this is the minimum acceptable option. Performance is fine. You’re not cutting corners on reliability.
Trade-off: Speed is the slowest among Gen 4 options, but still 7-10x faster than SATA. In real use, unnoticeable for anything except large file transfers.
View WD Blue SN580 on Amazon UK
NVMe Gen 5: Future-Proof (£90 for 1TB)
PCIe Gen 5 is the newest standard, offering theoretical speeds up to 14,000 MB/s. In 2026, only high-end mini PCs (Intel NUC 14 Pro) support Gen 5. For older mini PCs, Gen 5 drives won’t fully utilize their speed advantage.
Samsung 990 EVO Plus: Gen 5 drive, but intelligently designed with fallback to Gen 4 speeds on older hardware. Cost is £90 for 1TB. If your mini PC is DDR5/PCIe Gen 5 capable, this future-proofs your storage. Otherwise, buy Gen 4 instead.
Real advice: Skip Gen 5 unless you have a very new mini PC (2025+) with PCIe Gen 5 support. Gen 4 offers 95% of Gen 5’s performance at 40% lower cost.
View Samsung 990 EVO Plus on Amazon UK
SATA SSD: Older but Still Good (if available)
Samsung 870 EVO (£60 for 1TB): The current SATA flagship. Speeds top at 560 MB/s. If your mini PC has a 2.5″ slot, this is the most reliable option. But SATA is increasingly rare in 2026 — most mini PCs have moved entirely to NVMe.
Crucial MX500 (£55 for 1TB): Budget SATA option. 560 MB/s, excellent reliability, £5 cheaper than Samsung.
Real advice: Only buy SATA if your mini PC explicitly supports it. NVMe is universal and faster. Don’t buy SATA as primary storage in 2026.
Compact Option: M.2 2242 (if space is critical)
Some ultra-compact mini PCs (like ASUS PN42) use M.2 2242 slots instead of standard 2280. This is rare, but if your mini PC requires it:
WD SN740 (£40 for 512GB): 2242 form factor, 3150 MB/s. Only option you’ll find easily. Capacity maxes at 512GB-1TB due to form factor constraints.
Check before buying: Verify your mini PC’s storage slot size. 2280 is universal. 2242 is rare and limits your options.
External Storage: Samsung T5 (if internal slots are full)
If your mini PC has no spare M.2 slots and no 2.5″ bay, external USB 3.1 SSD is an excellent backup/expansion option.
Samsung T5 (£80 for 1TB): Compact, fast (550 MB/s), excellent build quality. Connects via USB-C. No installation required. Slower than internal NVMe, but still 40-50x faster than external HDD.
When to use it: Secondary media storage, backup drive, or if your mini PC has no internal expansion slots.
Capacity Recommendations by Use Case
Light office work (documents, email, web): 256GB is adequate. 512GB is comfortable.
Office work with light gaming (10-20 games installed): 512GB is minimum. 1TB is better if games average 50GB each.
Gaming enthusiast (30+ games, modern AAA titles): 1TB is minimum. 2TB is comfortable (modern AAA averages 100-150GB each).
Content creator (video/photo editing): 1TB primary storage minimum. 2TB+ recommended. Plus external backup.
Media server (Plex, torrents, file storage): 2TB+ minimum. Consider secondary 2.5″ SATA expansion if available.
Installation: How to Upgrade Mini PC Storage
Step 1: Power off and unplug the mini PC.
Step 2: Remove the chassis panel (usually two screws or a clip).
Step 3: Locate the M.2 slot (small vertical slot, often marked with an M symbol).
Step 4: If replacing existing drive: Remove the small screw at the slot’s end and gently pull the existing drive away from the slot (it will pop up at an angle). Set it aside.
Step 5: Insert the new drive at a 30-degree angle into the slot, then push down gently until the screw hole aligns. Replace the screw (hand-tight only).
Step 6: Replace the chassis panel and power on.
Step 7: Windows/Linux will auto-detect the new drive. If adding secondary storage, you may need to initialize it in Disk Management (Windows) or fdisk (Linux).
Total time: 5 minutes. No technical knowledge required.
Brand Reliability: Samsung vs WD vs Crucial
Samsung: Highest reputation, premium pricing. Excellent reliability. 5-10 year warranty depending on model. Worth the premium if you work with critical files.
WD (Western Digital): Second-largest drive manufacturer. Excellent reliability at lower prices than Samsung. 5-year warranty. SN850X is particularly good value.
Crucial: Owned by Micron, proven reliability at lowest cost. 5-year warranty. Excellent value. No performance penalty versus premium brands — you’re just choosing not to pay for the name premium.
Bottom line: All three are excellent and failure rates are identical. Choose by price/capacity, not brand. A £50 Crucial drive is as reliable as a £100 Samsung drive.
Real-World Storage Speed Impact
System boot time: 3-5 seconds difference between SATA and Gen 4 NVMe. Both are fast enough that you won’t complain. More noticeable on older systems with slow HDDs.
Game loading: Gen 4 NVMe loads games ~2-3 seconds faster than SATA. Unnoticeable in most games. Matters more in open-world games with frequent loading.
Large file operations: Copying a 50GB file takes ~10 seconds on Gen 4 NVMe vs ~100 seconds on SATA. Real-world impact matters only if you work with video or large media files daily.
Gaming performance (FPS): SSD speed does not affect FPS. GPU limits FPS, not storage speed. Faster SSD only helps with loading times.
Recommendations by Budget
Absolute minimum budget: WD Blue SN580 1TB (~£45). Adequate for anything, lowest cost.
Best value: Crucial P3 Plus 1TB (~£50). Perfect balance of speed and price.
Best performance/price: WD Black SN850X 1TB (~£80). Matches 990 Pro speed at lower cost.
Maximum speed, premium brand: Samsung 990 Pro 1TB (~£100). Fastest Gen 4, excellent warranty and support.
If you have a DDR5/PCIe Gen 5 mini PC: Samsung 990 EVO Plus 1TB (~£90). Future-proof, works on older hardware too.
If your mini PC has dual M.2 slots: Buy two 512GB drives instead of one 1TB (same price, more flexibility). Or one 1TB + one 512GB for secondary storage.
Frequently Asked Questions
Recommended Products
These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| Corsair Vengeance DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Top-rated DDR5 kit for gaming & productivity | View on Amazon UK |
| Kingston Fury Impact DDR5 SO-DIMM 32GB (2×16GB) 5600MHz | Excellent DDR5 alternative with XMP support | View on Amazon UK |
| Crucial DDR5 SO-DIMM 16GB 5600MHz | Affordable single-stick DDR5 | View on Amazon UK |
| G.Skill Ripjaws DDR5 SO-DIMM 32GB 5600MHz | High performance DDR5 for enthusiasts | View on Amazon UK |
| Samsung 990 Pro 2TB NVMe M.2 2280 | Fastest consumer NVMe — ideal for gaming & editing | View on Amazon UK |
| WD Black SN850X 2TB NVMe | Excellent Gen4 speed with heatsink option | View on Amazon UK |
| Crucial P5 Plus 1TB NVMe | Great value Gen4 SSD | View on Amazon UK |
| Kingston NV2 1TB NVMe | Budget-friendly with solid reliability | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
Related Guides
- Mac Mini Upgrades
- Lenovo Thinkcentre Mini Pc Upgrades
- Mini Pc Home Server Nas Guide
- Mini Pc Vesa Mount Guide
- How Much Power Does Mini Pc Use
