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External SSDs

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Corsair EX400U USB4 vs Lexar SL660 2TB

Compare Corsair EX400U USB4 and Lexar SL660 2TB 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 2TB
8.2/10

The 2TB SL660 doubles SLC cache budget over the 1TB. RGB and aluminum body preserved — a competitive Gen 2x2 2TB at moderate pricing. Worth comparing with the Kingston XS2000 2TB and Patriot Evlvr 2TB.

Gen 2x2 2000 MB/s
2TB storage
Aluminum body
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Spec Comparison

Spec
Corsair EX400U USB4
Lexar SL660 2TB
Read Speed
4.0 GB/s ✓
2.0 GB/s
Write Speed
3.6 GB/s ✓
2.0 GB/s
Capacity
1 TB
2 TB ✓
Interface
USB4
USB 3.2 Gen 2x2
Endurance (TBW)
700 TB
1,200 TB ✓
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
8.2/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, Corsair EX400U USB4 or Lexar SL660 2TB?
The Corsair EX400U USB4 scores 9.2/10 compared to 8.2/10 for the Lexar SL660 2TB. Our expert analysis favors the Corsair EX400U USB4 for its superior speed.
What's the difference between Corsair EX400U USB4 and Lexar SL660 2TB?
The key differences: The Corsair EX400U USB4 offers 4,000 MB/s reads vs 2,000 MB/s for the Lexar SL660 2TB. Capacity options differ: Corsair EX400U USB4 is 1TB while Lexar SL660 2TB is 2TB. The Corsair EX400U USB4 uses USB4 while the Lexar SL660 2TB uses USB 3.2 Gen 2x2.
Which is faster, Corsair EX400U USB4 or Lexar SL660 2TB?
The Corsair EX400U USB4 is faster with 4,000 MB/s read speeds compared to 2,000 MB/s for the Lexar SL660 2TB. That's a 100% speed advantage.
Which has better value, Corsair EX400U USB4 or Lexar SL660 2TB?
The Corsair EX400U USB4 scores higher (9.2 vs 8.2/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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