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Portable SSDs

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Corsair EX400U Portable 1TB vs Crucial X6 Portable 4TB

Compare Corsair EX400U Portable 1TB and Crucial X6 Portable 4TB 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
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Crucial

Crucial X6 Portable 4TB
8.0/10

A 4TB portable at the X6's budget price is closer to spinning-rust economics than SSD. The 800 MB/s ceiling doesn't matter for the use case — the entire point is capacious portable cold library overflow for PS5, Xbox, or photo archive, not peak throughput.

4TB at budget pricing
PS5/Xbox cold-library friendly
Cool operation
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Spec Comparison

Spec
Corsair EX400U Portable 1TB
Crucial X6 Portable 4TB
Read Speed
3.3 GB/s ✓
800 MB/s
Write Speed
3.0 GB/s ✓
800 MB/s
Capacity
1 TB
4 TB ✓
Interface
USB4
USB 3.2 Gen 2
Endurance (TBW)
600 TB
2,400 TB ✓
Warranty
5 Years ✓
3 Years
Score
9.0/10 ✓
8.0/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, Corsair EX400U Portable 1TB or Crucial X6 Portable 4TB?
The Corsair EX400U Portable 1TB scores 9.0/10 compared to 8.0/10 for the Crucial X6 Portable 4TB. Our expert analysis favors the Corsair EX400U Portable 1TB for its superior speed.
What's the difference between Corsair EX400U Portable 1TB and Crucial X6 Portable 4TB?
The key differences: The Corsair EX400U Portable 1TB offers 3,300 MB/s reads vs 800 MB/s for the Crucial X6 Portable 4TB. Capacity options differ: Corsair EX400U Portable 1TB is 1TB while Crucial X6 Portable 4TB is 4TB. The Corsair EX400U Portable 1TB uses USB4 while the Crucial X6 Portable 4TB uses USB 3.2 Gen 2.
Which is faster, Corsair EX400U Portable 1TB or Crucial X6 Portable 4TB?
The Corsair EX400U Portable 1TB is faster with 3,300 MB/s read speeds compared to 800 MB/s for the Crucial X6 Portable 4TB. That's a 313% speed advantage.
Which has better value, Corsair EX400U Portable 1TB or Crucial X6 Portable 4TB?
The Corsair EX400U Portable 1TB scores higher (9.0 vs 8.0/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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