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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.
3.2 GB/s reads and 2.8 GB/s writes put this drive in elite territory. A 50GB file — think a Premiere Pro project folder with proxies — transfers in ~18 seconds, and a 100GB Lightroom catalog takes ~36 seconds. That's direct-edit performance without internal storage constraints.
600 TBW endurance balances durability with affordability — suitable for regular use with room to spare. The 3-year warranty provides standard coverage for the expected lifespan of the drive.
Peak sequential speeds are impressive on paper, but sustained performance depends on thermal design. Without adequate cooling, expect throughput to taper during large continuous file transfers.
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.
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.
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 $SSK PM510 USB4 1TB feels similarly responsive to other fast portables for daily use. The real differentiator shows up during large file transfers, where the $3,200 MB/s read speed pulls noticeably ahead of slower SATA-based externals.
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.