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Western Digital
Model: WDBNAJ0040BBK
| Capacity | 4TB |
| Interface | USB 3.2 Gen 2 |
| Form Factor | External |
| Read Speed | 2,000 MB/s |
| Write Speed | 2,000 MB/s |
| Endurance (TBW) | 2,400 TB |
| Warranty | 5 Years |
A 4TB Black P50 with 5-year warranty — RGB-free PS5/Xbox cold-library overflow. The largest Gen 2x2 SSD with a console-gamer retail pricing model. Difficult to compete with at this capacity × warranty intersection.
See how it stacks up against competitors in our High-Speed Portable SSDs SSD comparison, or browse related SSD buying guides.
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4TB at 2.0 GB/s — the WD Black P50 Game Drive SSD Portable 4TB is the NVMe game drive that keeps up with your growing library.
With 2.0 GB/s reads and 2.0 GB/s writes, the WD Black P50 Game Drive SSD Portable 4TB delivers load times that rival internal SSDs. Open-world asset streaming, fast travel, and level transitions all benefit from the jump over traditional HDD external storage.
Roughly 50-100 AAA games fit on 4TB — enough to keep your current rotation installed without juggling uninstalls every time a new title drops.
This drive's throughput surpasses the USB bandwidth threshold most consoles can leverage. In practice, load times will be faster than any HDD but capped by the console's USB controller.
External USB drives work for playing Xbox and PlayStation games, but native internal NVMe storage is still required for Velocity Architecture and DirectStorage optimizations on some titles.
The WD Black P50 Game Drive SSD Portable 4TB targets users who need maximum throughput from an external drive. If you edit 4K or 6K video, move large project files between workstations, or work directly from external storage, the 2,000 MB/s read speed puts this drive in elite territory for a 4TB portable SSD.
At 4TB, this drive hits the sweet spot for users with substantial storage needs. Photo and video libraries, game collections, and professional project files all benefit from the headroom — you will not be juggling free space or swapping files between drives.
The USB 3.2 Gen 2 interface means the WD Black P50 Game Drive SSD Portable 4TB hits full speed on virtually any modern USB-C or USB-A port — no special hardware required. Plug it into a laptop, desktop, game console, or tablet and you get the same 2,000 MB/s performance without compatibility concerns.
On paper, the WD Black P50 Game Drive SSD Portable 4TB delivers 2,000 MB/s reads and 2,000 MB/s writes. In practice, a 50GB file — a typical 4K video project, a large game install, or a full photo shoot — transfers in ~25 seconds. A 100GB batch of raw files moves in ~50 seconds. For users who regularly shuttle large files, these transfer times are a meaningful productivity improvement over slower SATA-based externals that take 3-5x longer for the same tasks.
At 2,000 MB/s, thermal throttling is minimal during typical use. Only sustained sequential writes exceeding 100GB — such as backing up an entire media library in one pass — may cause the controller to reduce speeds temporarily. For everyday transfers and backups, you will consistently see performance near the rated specifications.
Sequential read and write speeds — the numbers manufacturers advertise — matter most when transferring single large files. For everyday tasks like opening documents, browsing photos, running applications from the drive, or loading games, random 4K performance is more relevant. All NVMe-based external SSDs deliver random IOPS in the same general range, so the $WD Black P50 Game Drive SSD Portable 4TB feels similarly responsive to other fast portables for daily use. The real differentiator shows up during large file transfers, where the $2,000 MB/s read speed pulls noticeably ahead of slower SATA-based externals.
The $WD Black P50 Game Drive SSD Portable 4TB is rated for $2,400 TBW (terabytes written) endurance. To put that in perspective: if you write 50GB per day — an aggressive daily workload for most users — the drive would take approximately $132 years to reach its endurance limit. For typical use patterns involving backups, file transfers, and game storage, the $2,400 TBW rating provides comfortable headroom well beyond the $5-year warranty period.
| Spec | WD Black P50 Game Drive SSD Portable 4TB | Samsung T9 Portable SSD |
|---|---|---|
| Read Speed | 2,000 MB/s | 2,000 MB/s |
| Write Speed | 2,000 MB/s | 1,950 MB/s |
| Capacity | 4TB | 1TB |
| Interface | USB 3.2 Gen 2 | USB 3.2 Gen 2x2 |
| Endurance | 2,400 TBW | 600 TBW |
| Score | 8.7/10 | 9.6/10 |
The Samsung T9 Portable SSD scores higher in our evaluation (9.6 vs 8.7/10). While the WD Black P50 Game Drive SSD Portable 4TB has lower scoring, it may offer advantages in other areas like endurance. Review the full specifications above before deciding.
For a detailed head-to-head comparison, see our full WD Black P50 Game Drive SSD Portable 4TB vs Samsung T9 Portable SSD comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| WD Black P50 Game Drive SSD Portable 4TB | 4TB | USB 3.2 Gen 2 | 2,000 | 2,000 | 2,400 |
| Samsung T9 Portable SSD | 1TB | USB 3.2 Gen 2x2 | 2,000 | 1,950 | 600 |
| Samsung T9 Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 2,400 |
| Crucial X10 Pro Portable 4TB | 4TB | USB 3.2 Gen 2x2 | 2,000 | 2,000 | 2,400 |
Specs shown for the closest High-Speed Portable SSDs alternatives. Full comparison table available on the compare page.
The WD Black P50 comes in multiple capacities. Smaller sizes save money if you do not need the headroom; larger sizes drop the cost-per-TB for media libraries and Time Machine backups.
Western Digital
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.
Western Digital
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.
Western Digital
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.
Western Digital
Price as of Aug 3, 2026, 6:33 PM. Prices and availability are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.