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OWC Envoy Pro FX 1TB vs SSK PM510 USB4 1TB — Which External SSD Is Faster & Better Value?

Compare OWC Envoy Pro FX 1TB and SSK PM510 USB4 1TB side by side. Both are 1TB Thunderbolt 3 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

OWC

OWC Envoy Pro FX 1TB

8.7/10

A 2800 MB/s Thunderbolt 3 portable in an aluminum unibody the size of an iPhone. The Envoy Pro FX is one of the cleanest Thunderbolt 3 portable SSDs in the price tier — nothing fancy, just speed and thermal management in a small case.

Thunderbolt 3 2800/2800 MB/s

Aluminum unibody heatsink

3-year warranty

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SSK

SSK PM510 USB4 1TB

8.6/10

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.

USB4 3200 MB/s

Thunderbolt 4 compatible

Aluminum body

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Spec Comparison

Spec

OWC Envoy Pro FX 1TB

SSK PM510 USB4 1TB

Read Speed

2.8 GB/s

3.2 GB/s ✓

Write Speed

2.8 GB/s

Capacity

1 TB

Interface

Thunderbolt 3

USB4

Endurance (TBW)

600 TB

Warranty

3 Years

Score

8.7/10 ✓

8.6/10

Total Wins

1 win

Frequently Asked Questions

Which is better, OWC Envoy Pro FX 1TB or SSK PM510 USB4 1TB?

The OWC Envoy Pro FX 1TB scores 8.7/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the OWC Envoy Pro FX 1TB for its superior value.

What's the difference between OWC Envoy Pro FX 1TB and SSK PM510 USB4 1TB?

The key differences: The OWC Envoy Pro FX 1TB offers 2,800 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: OWC Envoy Pro FX 1TB is 1TB while SSK PM510 USB4 1TB is 1TB. The OWC Envoy Pro FX 1TB uses Thunderbolt 3 while the SSK PM510 USB4 1TB uses USB4.

Which is faster, OWC Envoy Pro FX 1TB or SSK PM510 USB4 1TB?

The SSK PM510 USB4 1TB is faster with 3,200 MB/s read speeds compared to 2,800 MB/s for the OWC Envoy Pro FX 1TB. That's a 14% speed advantage.

Which has better value, OWC Envoy Pro FX 1TB or SSK PM510 USB4 1TB?

The OWC Envoy Pro FX 1TB scores higher (8.7 vs 8.6/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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