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SSK
Model: PM510-1T
| Capacity | 1TB |
| Interface | USB4 |
| Form Factor | External |
| Read Speed | 3,200 MB/s |
| Write Speed | 2,800 MB/s |
| Endurance (TBW) | 600 TB |
| Warranty | 3 Years |
AUSB4 portable at enthusiast-grade specs — 3200 MB/s read over USB4 / Thunderbolt 4 hosts. The PM510 is one of the more affordable USB4 portables, an entry point for video editors who need Thunderbolt-class speeds but don't want to pay LaCie or OWC premium.
See how it stacks up against competitors in our Thunderbolt External SSDs SSD comparison, or browse related SSD buying guides.
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3.2 GB/s reads / 2.8 GB/s writes via USB4: the SSK SSK PM510 USB4 1TB is built for creators who cannot afford to wait on file transfers.
With 3.2 GB/s sequential reads and 2.8 GB/s sequential writes over USB4, this drive redefines what an external SSD can do. A 50GB 4K video project transfers in ~18 seconds; a 100GB RAW photo session moves in ~36 seconds.
600 TBW endurance covers moderate daily use across a multi-year lifespan. The 3-year warranty provides standard coverage for the expected lifespan of the drive.
Sustained write workloads can push controller temperatures past 70°C, triggering thermal throttling that reduces throughput by 30-40%. Full metal enclosures manage heat better than slim plastic designs.
USB4 delivers the bandwidth needed for seamless playback and editing of high-bitrate media directly from the drive — no file transfer required.
The SSK PM510 USB4 1TB 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 3,200 MB/s read speed puts this drive in elite territory for a 1TB portable SSD.
The 1TB capacity covers most daily workflows comfortably: system backups, a working photo library, a dozen game installs, or a collection of documents and media. If you need more space, higher-capacity variants of the same product line are worth considering.
One important note: reaching the full 3,200 MB/s requires a Thunderbolt 4 or USB4 host port. On a standard USB 3.2 Gen 2 port, the drive still works perfectly but negotiates down to 10 Gbps. Most laptops from 2022 onward include a compatible port on premium models, but verify your hardware before expecting peak performance.
On paper, the SSK PM510 USB4 1TB delivers 3,200 MB/s reads and 2,800 MB/s writes. In practice, a 50GB file — a typical 4K video project, a large game install, or a full photo shoot — transfers in ~18 seconds. A 100GB batch of raw files moves in ~36 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. 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 3,200 MB/s, the controller generates significant heat during extended writes. Sustained sequential transfers of 200GB or more can push controller temperatures past 70°C, triggering thermal throttling that reduces throughput by 20-35%. The aluminum enclosure helps dissipate heat, but for sustained workloads, expect speeds to settle below the rated peak after several minutes of continuous writing.
The SSK PM510 USB4 1TB is rated for 600 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 33 years to reach its endurance limit. For typical use patterns involving backups, file transfers, and game storage, the 600 TBW rating provides comfortable headroom well beyond the 3-year warranty period.
| Spec | SSK PM510 USB4 1TB | Sabrent Rocket Nano XTRM-Q |
|---|---|---|
| Read Speed | 3,200 MB/s | 3,000 MB/s |
| Write Speed | 2,800 MB/s | 2,800 MB/s |
| Capacity | 1TB | 1TB |
| Interface | USB4 | USB4 |
| Endurance | 600 TBW | 700 TBW |
| Score | 8.6/10 | 9.4/10 |
The Sabrent Rocket Nano XTRM-Q scores higher in our evaluation (9.4 vs 8.6/10). While the SSK PM510 USB4 1TB has lower scoring, it may offer advantages in other areas like value. Review the full specifications above before deciding.
For a detailed head-to-head comparison, see our full SSK PM510 USB4 1TB vs Sabrent Rocket Nano XTRM-Q comparison.
| Model | Capacity | Interface | Read | Write | TBW |
|---|---|---|---|---|---|
| SSK PM510 USB4 1TB | 1TB | USB4 | 3,200 | 2,800 | 600 |
| Sabrent Rocket Nano XTRM-Q | 1TB | USB4 | 3,000 | 2,800 | 700 |
| Corsair EX400U USB4 | 1TB | USB4 | 4,000 | 3,600 | 700 |
| LaCie Rugged SSD Pro 4TB | 4TB | Thunderbolt 3 | 2,700 | 1,900 | 2,400 |
Specs shown for the closest Thunderbolt External SSDs alternatives. Full comparison table available on the compare page.
SSK
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.