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Corsair EX400U 1TB vs SSK PM510 USB4 1TB

Compare Corsair EX400U 1TB and SSK PM510 USB4 1TB side by side. Both are 1TB USB4 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

Corsair

Corsair EX400U 1TB

9.0/10

A 1TB USB4 portable — 3300 MB/s read on a Thunderbolt 4 / USB4 host. The EX400U is the rare USB4 drive that supports the full 40Gbps link (not all USB4 drives do). 5-year warranty is best-in-class for the speed tier.

USB4 3300 MB/s read

5-year warranty

Full 40Gbps USB4 link

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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

Corsair EX400U 1TB

SSK PM510 USB4 1TB

Read Speed

3.3 GB/s ✓

3.2 GB/s

Write Speed

3.0 GB/s ✓

2.8 GB/s

Capacity

1 TB

Interface

USB4

Endurance (TBW)

600 TB

Warranty

5 Years ✓

3 Years

Score

9.0/10 ✓

8.6/10

Total Wins

4 wins

0 wins

Frequently Asked Questions

Which is better, Corsair EX400U 1TB or SSK PM510 USB4 1TB?

The Corsair EX400U 1TB scores 9.0/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the Corsair EX400U 1TB for its superior speed.

What's the difference between Corsair EX400U 1TB and SSK PM510 USB4 1TB?

The key differences: The Corsair EX400U 1TB offers 3,300 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: Corsair EX400U 1TB is 1TB while SSK PM510 USB4 1TB is 1TB. The Corsair EX400U 1TB uses USB4 while the SSK PM510 USB4 1TB uses USB4.

Which is faster, Corsair EX400U 1TB or SSK PM510 USB4 1TB?

The Corsair EX400U 1TB is faster with 3,300 MB/s read speeds compared to 3,200 MB/s for the SSK PM510 USB4 1TB. That's a 3% speed advantage.

Which has better value, Corsair EX400U 1TB or SSK PM510 USB4 1TB?

The Corsair EX400U 1TB scores higher (9.0 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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