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Corsair EX400U 1TB vs Crucial X9 Pro 1TB

Compare Corsair EX400U 1TB and Crucial X9 Pro 1TB 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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Crucial

Crucial X9 Pro 1TB

9.0/10

A 1050 MB/s portable SSD for creators who need TLC NAND, hardware encryption, and a 5-year warranty at less than Extreme Pro prices. The X9 Pro is Crucial's premium Gen 2 line — it targets direct-edit workflows where sustained writes and write endurance matter more than headline speeds.

Real TLC NAND (not QLC)

5-year warranty

AES 256-bit hardware encryption

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Spec Comparison

Spec

Corsair EX400U 1TB

Crucial X9 Pro 1TB

Read Speed

3.3 GB/s ✓

1.1 GB/s

Write Speed

3.0 GB/s ✓

950 MB/s

Capacity

1 TB

Interface

USB4

USB 3.2 Gen 2

Endurance (TBW)

600 TB

Warranty

5 Years

Score

9.0/10

Total Wins

2 wins

0 wins

Frequently Asked Questions

Which is better, Corsair EX400U 1TB or Crucial X9 Pro 1TB?

Both drives score 9.0/10 in our expert testing. The best choice depends on your specific needs.

What's the difference between Corsair EX400U 1TB and Crucial X9 Pro 1TB?

The key differences: The Corsair EX400U 1TB offers 3,300 MB/s reads vs 1,050 MB/s for the Crucial X9 Pro 1TB. Capacity options differ: Corsair EX400U 1TB is 1TB while Crucial X9 Pro 1TB is 1TB. The Corsair EX400U 1TB uses USB4 while the Crucial X9 Pro 1TB uses USB 3.2 Gen 2.

Which is faster, Corsair EX400U 1TB or Crucial X9 Pro 1TB?

The Corsair EX400U 1TB is faster with 3,300 MB/s read speeds compared to 1,050 MB/s for the Crucial X9 Pro 1TB. That's a 214% speed advantage.

Which has better value, Corsair EX400U 1TB or Crucial X9 Pro 1TB?

Both drives score the same in our evaluation. Consider features, endurance, and warranty to determine which suits your needs better.

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