![Western Digital 4TB SN850X M.2 2280 Gaming SSD Built-in NVMe PCIe Gen4x4 Read Up to 7300MB/s Write Up to 6600MB/s WDBB9G0040BNC [Parallel Import]](https://m.media-amazon.com/images/I/51q6hw1Y-mL._AC_SL1500_.jpg)
Western Digital
Western Digital 4TB SN850X M.2 2280 Gaming SSD Built-in NVMe PCIe Gen4x4 Read Up to 7300MB/s Write Up to 6600MB/s WDBB9G0040BNC [Parallel Import]
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
■Interface※1: PCIe Gen4 16GT/s Max 4 lanes ■External Dimensions (without heatsink) Length (Max): 80 ± 0.15m, Width (Max): 22 ± 0.15mm, Height (Max): 2.38mm, Weight (Max): 7.5g ± 1g ■External Dimensions (with heatsink) Length (max): 80 ± 0 0 0.23.20 ± ± 0.23.20 ± 0.0 0.8 inches (20 mm), Height (max): 8.80 ± 0.20 mm, Weight (max): 24 g ± 3 g; Durability (TBW) *2 4TB: 2400, 2TB: 1200, 1TB: 600 ■ Sequential Read *3 4TB: 7,300 MB/s, 1TB: 7 MB/s ,300MB/. Seconds
SpecPicks Verdict
SpecPicks classifies Western Digital 4TB SN850X M.2 2280 Gaming SSD Built-in NVMe PCIe Gen… as a category leader on buyer feedback in the ssds & storage category, based on 14 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. Western Digital's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 4.6★ average across customer reviews
- ✓ Compatible with PlayStation 5 (models with heatsink only)
- ✓ Backed by Western Digital's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Limited review volume so far — fewer data points on long-term reliability
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- M.2 2280
- PCIe Gen4 x 4 (backwards compatible with PCIe Gen3 x4, PCIe Gen3 x2, PCIe Gen3 x1, PCIe Gen2 x4, PCIe Gen2 x2, PCIe Gen2 x1)
- Sequential Read: Up to 7300MB/s Sequential Write: Up to 6600MB/s (1TB models up to 6300MB/s)
- Manufacturer's Warranty: 5 years at a domestic agent with maximum durability (TBW) limits (if the seller warrants the condition of each seller's warranty will be listed)
- Compatible with PlayStation 5 (models with heatsink only)
Full Specifications
| Brand | Western Digital |
|---|---|
| Color | Black |
| Model Name | WD_Black |
| Read Speed | 7300 Megabytes Per Second |
| Unit Count | 1.0 Count |
| Form Factor | M 2 |
| Media Speed | 6600 |
| Model Number | WDBB9G0040BNC-WRSN |
| Hard-Drive Size | 4 TB |
| Mfr Part Number | WDBB9G0040BNC |
| Number of Items | 1 |
| Sequential Read | Up to 7300MB/s Sequential Write: Up to 6600MB/s (1TB models up to 6300MB/s) |
| Special Feature | PlayStation5 Tested to Work |
| Installation Type | Built In |
Ready to buy?
Western Digital 4TB SN850X M.2 2280 Gaming SSD Built-in NVMe PCIe Gen4x4 Read Up to 7300MB/s Write Up to 6600MB/s WDBB9G0040BNC [Parallel Import] is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
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