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External SSDs

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Corsair EX400U 1TB vs Crucial X9 Pro 2TB

Compare Corsair EX400U 1TB and Crucial X9 Pro 2TB 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
Check on Amazon →
Our Pick

Crucial

Crucial X9 Pro 2TB
9.1/10

The 2TB X9 Pro keeps the same sustained-write profile as the 1TB but with double the cache budget before throttle. A cost-effective workhorse drive for anyone editing directly off external storage.

Real TLC NAND
5-year warranty
Doubles sustained-write cache size
Check on Amazon →

Spec Comparison

Spec
Corsair EX400U 1TB
Crucial X9 Pro 2TB
Read Speed
3.3 GB/s ✓
1.1 GB/s
Write Speed
3.0 GB/s ✓
950 MB/s
Capacity
1 TB
2 TB ✓
Interface
USB4
USB 3.2 Gen 2
Endurance (TBW)
600 TB
1,200 TB ✓
Warranty
5 Years
5 Years
Score
9.0/10
9.1/10 ✓
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, Corsair EX400U 1TB or Crucial X9 Pro 2TB?
The Crucial X9 Pro 2TB scores 9.1/10 compared to 9.0/10 for the Corsair EX400U 1TB. Our expert analysis favors the Crucial X9 Pro 2TB for its superior value.
What's the difference between Corsair EX400U 1TB and Crucial X9 Pro 2TB?
The key differences: The Corsair EX400U 1TB offers 3,300 MB/s reads vs 1,050 MB/s for the Crucial X9 Pro 2TB. Capacity options differ: Corsair EX400U 1TB is 1TB while Crucial X9 Pro 2TB is 2TB. The Corsair EX400U 1TB uses USB4 while the Crucial X9 Pro 2TB uses USB 3.2 Gen 2.
Which is faster, Corsair EX400U 1TB or Crucial X9 Pro 2TB?
The Corsair EX400U 1TB is faster with 3,300 MB/s read speeds compared to 1,050 MB/s for the Crucial X9 Pro 2TB. That's a 214% speed advantage.
Which has better value, Corsair EX400U 1TB or Crucial X9 Pro 2TB?
The Crucial X9 Pro 2TB scores higher (9.1 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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