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External SSDs

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Corsair EX400U USB4 vs Lexar SL660 1TB

Compare Corsair EX400U USB4 and Lexar SL660 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
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Lexar

Lexar SL660 1TB
8.1/10

A premium 2000 MB/s Gen 2x2 portable with an aluminum body and an RGB-lit Logo. The RGB is a divisive feature but the performance is real, and the build quality distinguishes it from cheaper Gen 2x2 peers like the Patriot Evlvr.

Gen 2x2 2000/2000 MB/s
Aluminum body
3-year warranty
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Spec Comparison

Spec
Corsair EX400U USB4
Lexar SL660 1TB
Read Speed
4.0 GB/s ✓
2.0 GB/s
Write Speed
3.6 GB/s ✓
2.0 GB/s
Capacity
1 TB ✓
1 TB
Interface
USB4
USB 3.2 Gen 2x2
Endurance (TBW)
700 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
8.1/10
Total Wins
6 wins
0 wins

Frequently Asked Questions

Which is better, Corsair EX400U USB4 or Lexar SL660 1TB?
The Corsair EX400U USB4 scores 9.2/10 compared to 8.1/10 for the Lexar SL660 1TB. Our expert analysis favors the Corsair EX400U USB4 for its superior speed.
What's the difference between Corsair EX400U USB4 and Lexar SL660 1TB?
The key differences: The Corsair EX400U USB4 offers 4,000 MB/s reads vs 2,000 MB/s for the Lexar SL660 1TB. Capacity options differ: Corsair EX400U USB4 is 1TB while Lexar SL660 1TB is 1TB. The Corsair EX400U USB4 uses USB4 while the Lexar SL660 1TB uses USB 3.2 Gen 2x2.
Which is faster, Corsair EX400U USB4 or Lexar SL660 1TB?
The Corsair EX400U USB4 is faster with 4,000 MB/s read speeds compared to 2,000 MB/s for the Lexar SL660 1TB. That's a 100% speed advantage.
Which has better value, Corsair EX400U USB4 or Lexar SL660 1TB?
The Corsair EX400U USB4 scores higher (9.2 vs 8.1/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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