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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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Everyday external storage done right: 4TB capacity, 1.1 GB/s reads, and the reliability you expect from Western Digital.
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 positions this as pro-grade — built for daily rewrite cycles without degradation. The 3-year warranty provides standard coverage for the expected lifespan of the drive.
4TB provides generous headroom for creative workflows — a working photo library, active video projects, and a game library all on one portable drive.
1.1 GB/s reads are typical of a SATA SSD in an external enclosure — noticeably faster than any external HDD, yet well below the speed of Gen 2×2 or Thunderbolt drives. For most daily tasks, this is more than enough.
The WD My Passport SSD Portable 4TB is a solid all-around 4TB portable SSD for everyday use. If you need fast backups, reliable file transport between devices, or external storage for documents, photos, and media, the 1,050 MB/s reads deliver performance that makes daily tasks feel instant compared to an external hard drive.
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.
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 My Passport SSD Portable 4TB feels similarly responsive to other fast portables for daily use. The real differentiator shows up during large file transfers, where the $1,050 MB/s read speed pulls noticeably ahead of slower SATA-based externals.
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.