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External SSDs

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Corsair EX400U 1TB vs LaCie Rugged SSD Pro 4TB

Compare Corsair EX400U 1TB and LaCie Rugged SSD Pro 4TB side by side. Both are 1TB USB4 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Corsair

Corsair EX400U 1TB
9.0/10

A 1TB USB4 portable — 3300 MB/s read on a Thunderbolt 4 / USB4 host. The EX400U is the rare USB4 drive that supports the full 40Gbps link (not all USB4 drives do). 5-year warranty is best-in-class for the speed tier.

USB4 3300 MB/s read
5-year warranty
Full 40Gbps USB4 link
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Our Pick

LaCie

LaCie Rugged SSD Pro 4TB
9.2/10

A 4TBThunderbolt 3 portable — uniquely huge for this speed tier. The Rugged SSD Pro 4TB fills a slot nothing else really does: 4TB of fast external storage that's actually rugged, not just claimed to be.

Thunderbolt 3 + 4TB
IP67 + 3m drop + 1-ton crush
5-year Rescue
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Spec Comparison

Spec
Corsair EX400U 1TB
LaCie Rugged SSD Pro 4TB
Read Speed
3.3 GB/s ✓
2.7 GB/s
Write Speed
3.0 GB/s ✓
1.9 GB/s
Capacity
1 TB
4 TB ✓
Interface
USB4
Thunderbolt 3
Endurance (TBW)
600 TB
2,400 TB ✓
Warranty
5 Years
5 Years
Score
9.0/10
9.2/10 ✓
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, Corsair EX400U 1TB or LaCie Rugged SSD Pro 4TB?
The LaCie Rugged SSD Pro 4TB scores 9.2/10 compared to 9.0/10 for the Corsair EX400U 1TB. Our expert analysis favors the LaCie Rugged SSD Pro 4TB for its superior value.
What's the difference between Corsair EX400U 1TB and LaCie Rugged SSD Pro 4TB?
The key differences: The Corsair EX400U 1TB offers 3,300 MB/s reads vs 2,700 MB/s for the LaCie Rugged SSD Pro 4TB. Capacity options differ: Corsair EX400U 1TB is 1TB while LaCie Rugged SSD Pro 4TB is 4TB. The Corsair EX400U 1TB uses USB4 while the LaCie Rugged SSD Pro 4TB uses Thunderbolt 3.
Which is faster, Corsair EX400U 1TB or LaCie Rugged SSD Pro 4TB?
The Corsair EX400U 1TB is faster with 3,300 MB/s read speeds compared to 2,700 MB/s for the LaCie Rugged SSD Pro 4TB. That's a 22% speed advantage.
Which has better value, Corsair EX400U 1TB or LaCie Rugged SSD Pro 4TB?
The LaCie Rugged SSD Pro 4TB scores higher (9.2 vs 9.0/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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