WD Red Plus 8TB vs Samsung 990 Pro 2TB: Which Should You Buy?
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Quick verdict
| What you need | Recommended drive |
|---|---|
| Mass‑storage for a 4–bay NAS (media libraries, backups) | WD Red Plus 8TB – the cheap‑per‑TB CMR HDD that stays quiet in a rack. |
| Lightning‑fast cache or VM storage on a PCIe‑ready workstation | Samsung 990 Pro 2TB – an NVMe SSD that hits ~7,450 MB/s and survives heavy writes. |
If you’re building a home NAS for bulk files, grab the WD Red Plus. If your priority is speed—think “instant VM snapshots” or “scratch disk for video editing”—the Samsung 990 Pro wins despite its higher price per gigabyte.
Spec‑by‑spec comparison
| Feature | WD Red Plus 8TB (affiliate) | Samsung 990 Pro 2TB (affiliate) |
|---|---|---|
| Category | NAS HDD | NVMe SSD |
| Type | HARDWARE | HARDWARE |
| Price* | $180 | $160 |
| Best for | NAS storage | Cache / fast VMs |
| Interface | 3.5” SATA, 5640 RPM | PCIe 4.0 NVMe |
| Capacity | 8 TB (CMR) | 2 TB |
| Cache / RAM | 256 MB cache | — |
| Sequential speed | 5640 RPM (mechanical) | ~7,450 MB/s |
| Pros (from vendor) | CMR, reliable, quiet | Top speed, endurance |
| Cons (from vendor) | Price/TB | Premium price |
*Prices are list prices at the time of writing; actual cost may vary.
Real‑world performance
1. Speed vs. Capacity
The Samsung 990 Pro’s PCIe 4.0 interface delivers a theoretical ~7,450 MB/s—enough to saturate a 10 GbE link in a single drive. In my homelab I use it as the primary cache for Unraid and see VM boot times drop from seconds to sub‑second. The WD Red Plus, on the other hand, spins at 5,640 RPM. That’s fine for streaming media or nightly backups where throughput in the low hundreds of MB/s is acceptable.
2. Workload endurance
CMR (Conventional Magnetic Recording) on the Red Plus means it writes data sequentially and behaves predictably under heavy NAS traffic—perfect for RAID‑1/5 arrays that see many small writes. The Samsung’s “endurance” claim translates to a high TBW rating, so I feel comfortable running VMs with daily write cycles without fearing premature wear.
3. Noise & power
A 3.5″ HDD inevitably produces audible spin‑up and idle whir; the Red Plus is surprisingly quiet for its class but still louder than any SSD. Power draw on my Synology NAS climbs by a few watts per drive, which matters if you run it 24/7. The Samsung draws almost nothing when idle—ideal for a workstation that sleeps often.
Pros & cons
WD Red Plus 8TB (affiliate)
Pros
- CMR reliability: Predictable write behavior in multi‑disk NAS.
- Quiet operation: Low acoustic profile for home use.
- Large capacity per drive: 8 TB fits neatly into a 4‑bay chassis.
Cons
- Price/TB: At $180 the cost per terabyte is higher than bulk SATA drives.
- Mechanical limits: No chance of matching SSD latency or throughput.
Samsung 990 Pro 2TB (affiliate)
Pros
- Top speed: ~7,450 MB/s shaves minutes off large file copies and VM boots.
- Endurance: Built for heavy write workloads; great as a cache tier.
- Compact form factor: No moving parts, fits any M.2 slot.
Cons
- Premium price per GB: $160 for 2 TB still feels steep if you need many terabytes.
- Capacity ceiling: You’ll need multiple drives or external storage to reach NAS‑scale volumes.
Which should you buy?
If your primary goal is capacity and reliability in a networked storage box, the WD Red Plus 8TB is the sensible choice. It integrates seamlessly into any 3.5″ bay, works with standard SATA controllers,