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Corsair EX400U USB4 vs Crucial X9 Pro 1TB

Compare Corsair EX400U USB4 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.

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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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 USB4

Crucial X9 Pro 1TB

Read Speed

4.0 GB/s ✓

1.1 GB/s

Write Speed

3.6 GB/s ✓

950 MB/s

Capacity

1 TB ✓

1 TB

Interface

USB4

USB 3.2 Gen 2

Endurance (TBW)

700 TB ✓

600 TB

Warranty

5 Years

Score

9.2/10 ✓

9.0/10

Total Wins

5 wins

0 wins

Frequently Asked Questions

Which is better, Corsair EX400U USB4 or Crucial X9 Pro 1TB?

The Corsair EX400U USB4 scores 9.2/10 compared to 9.0/10 for the Crucial X9 Pro 1TB. Our expert analysis favors the Corsair EX400U USB4 for its superior speed.

What's the difference between Corsair EX400U USB4 and Crucial X9 Pro 1TB?

The key differences: The Corsair EX400U USB4 offers 4,000 MB/s reads vs 1,050 MB/s for the Crucial X9 Pro 1TB. Capacity options differ: Corsair EX400U USB4 is 1TB while Crucial X9 Pro 1TB is 1TB. The Corsair EX400U USB4 uses USB4 while the Crucial X9 Pro 1TB uses USB 3.2 Gen 2.

Which is faster, Corsair EX400U USB4 or Crucial X9 Pro 1TB?

The Corsair EX400U USB4 is faster with 4,000 MB/s read speeds compared to 1,050 MB/s for the Crucial X9 Pro 1TB. That's a 281% speed advantage.

Which has better value, Corsair EX400U USB4 or Crucial X9 Pro 1TB?

The Corsair EX400U USB4 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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