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Western Digital
Model: WDBKVX0460BBK
| Capacity | 4TB |
| Interface | USB 3.2 Gen 2 |
| Form Factor | External |
| Read Speed | 1,050 MB/s |
| Write Speed | 1,000 MB/s |
| Endurance (TBW) | 2,400 TB |
| Warranty | 3 Years |
A 4TB My Passport SSD portable — same physical package as the 1TB/2TB but with the 4TB die stack. The biggest single-portable WD ships and one of the few 4TB portable SSDs at retail, period. Compares closely with the Samsung T7 4TB.
See how it stacks up against competitors in our Ultra-Portable SSDs SSD comparison, or browse related SSD buying guides.
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The WD My Passport SSD Portable 4TB: 4TB, 1.1 GB/s reads, 1.0 GB/s writes, and a price that makes it an easy choice for daily backups and file transport.
The Western Digital WD My Passport SSD Portable 4TB offers 1.1 GB/s reads and 1.0 GB/s writes — enough for everyday computing without breaking the bank. System backups, file transfers between machines, and external media storage all run smoothly.
4TB of storage provides generous headroom for everyday files. The compact, lightweight design slips into any bag pocket. 2,400 TBW endurance exceeds what most consumer drives offer — engineered for creators who write terabytes per week. The 3-year warranty provides standard coverage for the expected lifespan of the drive.
At 4TB, this drive hits a sweet spot for photo and video libraries. You can store thousands of RAW images or hours of 4K footage without juggling multiple drives.
In the speed hierarchy, the WD My Passport SSD Portable 4TB sits above HDDs and below NVMe. Think of it as a SATA SSD in your pocket — fast enough for 95% of daily tasks at a fraction of the cost of the fastest USB drives.
The WD My Passport 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 1,050 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 My Passport 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 1,050 MB/s performance without compatibility concerns.
On paper, the WD My Passport SSD Portable 4TB delivers 1,050 MB/s reads and 1,000 MB/s writes. In practice, a 50GB file — a typical 4K video project, a large game install, or a full photo shoot — transfers in ~50 seconds. A 100GB batch of raw files moves in ~2 minutes. 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. Note: those numbers describe large sequential transfers — everyday tasks (opening documents, app launches, game loads) feel equally fast across all NVMe portables because random 4K performance is similar drive-to-drive.
At 1,050 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.
The WD My Passport 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 3-year warranty period.
| Spec | WD My Passport SSD Portable 4TB | Samsung T7 Portable 2TB |
|---|---|---|
| Read Speed | 1,050 MB/s | 1,050 MB/s |
| Write Speed | 1,000 MB/s | 1,000 MB/s |
| Capacity | 4TB | 2TB |
| Interface | USB 3.2 Gen 2 | USB 3.2 Gen 2 |
| Endurance | 2,400 TBW | 1,200 TBW |
| Score | 8.7/10 | 9.4/10 |
The Samsung T7 Portable 2TB scores higher in our evaluation (9.4 vs 8.7/10). While the WD My Passport 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 My Passport SSD Portable 4TB vs Samsung T7 Portable 2TB comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| WD My Passport SSD Portable 4TB | 4TB | USB 3.2 Gen 2 | 1,050 | 1,000 | 2,400 |
| Samsung T7 Portable 2TB | 2TB | USB 3.2 Gen 2 | 1,050 | 1,000 | 1,200 |
| Samsung T7 Portable 4TB | 4TB | USB 3.2 Gen 2 | 1,050 | 1,000 | 2,400 |
| Samsung T7 Portable SSD | 1TB | USB 3.2 Gen 2 | 1,050 | 1,000 | 580 |
Specs shown for the closest Ultra-Portable SSDs alternatives. Full comparison table available on the compare page.
The WD My Passport SSD 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.