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External SSDs

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Corsair EX400U USB4 vs SSK PM510 USB4 1TB

Compare Corsair EX400U USB4 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 USB4
9.2/10

High-bandwidth USB4 external SSD delivering up to 4,000MB/s reads with MagSafe compatibility. Perfect for creative professionals with Thunderbolt 4 and USB4 laptops.

Blazing 4000MB/s read speeds over USB4
MagSafe magnetic attachment for iPhone
Full Thunderbolt 4 backward compatibility
Check on Amazon →

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
Check on Amazon →

Spec Comparison

Spec
Corsair EX400U USB4
SSK PM510 USB4 1TB
Read Speed
4.0 GB/s ✓
3.2 GB/s
Write Speed
3.6 GB/s ✓
2.8 GB/s
Capacity
1 TB ✓
1 TB
Interface
USB4
USB4
Endurance (TBW)
700 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
8.6/10
Total Wins
6 wins
0 wins

Frequently Asked Questions

Which is better, Corsair EX400U USB4 or SSK PM510 USB4 1TB?
The Corsair EX400U USB4 scores 9.2/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the Corsair EX400U USB4 for its superior speed.
What's the difference between Corsair EX400U USB4 and SSK PM510 USB4 1TB?
The key differences: The Corsair EX400U USB4 offers 4,000 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: Corsair EX400U USB4 is 1TB while SSK PM510 USB4 1TB is 1TB. The Corsair EX400U USB4 uses USB4 while the SSK PM510 USB4 1TB uses USB4.
Which is faster, Corsair EX400U USB4 or SSK PM510 USB4 1TB?
The Corsair EX400U USB4 is faster with 4,000 MB/s read speeds compared to 3,200 MB/s for the SSK PM510 USB4 1TB. That's a 25% speed advantage.
Which has better value, Corsair EX400U USB4 or SSK PM510 USB4 1TB?
The Corsair EX400U USB4 scores higher (9.2 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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