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Portable SSDs

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Corsair EX400U Portable 1TB vs SSK PM510 USB4 Portable 1TB

Compare Corsair EX400U Portable 1TB and SSK PM510 USB4 Portable 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 Portable 1TB
9.0/10

A USB4 portable from Corsair with 3300 MB/s read on Thunderbolt 4 / USB4 hosts - and the full 5-year warranty. The EX400U 1TB portable is a competitive USB4 entry point for video editors who need Thunderbolt-class speeds without the LaCie price tag.

USB4 3300 MB/s read
5-year warranty
Full 40Gbps USB4 link
Check on Amazon →

SSK

SSK PM510 USB4 Portable 1TB
8.6/10

A USB4 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 do not want to pay LaCie or OWC premium.

USB4 3200 MB/s
Thunderbolt 4 compatible
Aluminum body
Check on Amazon →

Spec Comparison

Spec
Corsair EX400U Portable 1TB
SSK PM510 USB4 Portable 1TB
Read Speed
3.3 GB/s ✓
3.2 GB/s
Write Speed
3.0 GB/s ✓
2.8 GB/s
Capacity
1 TB
1 TB
Interface
USB4
USB4
Endurance (TBW)
600 TB
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 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The Corsair EX400U Portable 1TB scores 9.0/10 compared to 8.6/10 for the SSK PM510 USB4 Portable 1TB. Our expert analysis favors the Corsair EX400U Portable 1TB for its superior speed.
What's the difference between Corsair EX400U Portable 1TB and SSK PM510 USB4 Portable 1TB?
The key differences: The Corsair EX400U Portable 1TB offers 3,300 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: Corsair EX400U Portable 1TB is 1TB while SSK PM510 USB4 Portable 1TB is 1TB. The Corsair EX400U Portable 1TB uses USB4 while the SSK PM510 USB4 Portable 1TB uses USB4.
Which is faster, Corsair EX400U Portable 1TB or SSK PM510 USB4 Portable 1TB?
The Corsair EX400U Portable 1TB is faster with 3,300 MB/s read speeds compared to 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. That's a 3% speed advantage.
Which has better value, Corsair EX400U Portable 1TB or SSK PM510 USB4 Portable 1TB?
The Corsair EX400U Portable 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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