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External SSDs

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Corsair EX400U 1TB vs Seagate One Touch SSD 2TB

Compare Corsair EX400U 1TB and Seagate One Touch SSD 2TB 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 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 →

Seagate

Seagate One Touch SSD 2TB
7.8/10

The 2TB One Touch is the sweet spot of Seagate's budget portable line — large enough die stack that the sustained-write dropoff after SLC exhaustion is significantly longer than on the 1TB.

1030 MB/s rated
Both cables in box
Rescue data recovery
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Spec Comparison

Spec
Corsair EX400U 1TB
Seagate One Touch SSD 2TB
Read Speed
3.3 GB/s ✓
1.0 GB/s
Write Speed
3.0 GB/s ✓
1.0 GB/s
Capacity
1 TB
2 TB ✓
Interface
USB4
USB 3.2 Gen 2
Endurance (TBW)
600 TB
1,200 TB ✓
Warranty
5 Years ✓
3 Years
Score
9.0/10 ✓
7.8/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, Corsair EX400U 1TB or Seagate One Touch SSD 2TB?
The Corsair EX400U 1TB scores 9.0/10 compared to 7.8/10 for the Seagate One Touch SSD 2TB. Our expert analysis favors the Corsair EX400U 1TB for its superior speed.
What's the difference between Corsair EX400U 1TB and Seagate One Touch SSD 2TB?
The key differences: The Corsair EX400U 1TB offers 3,300 MB/s reads vs 1,030 MB/s for the Seagate One Touch SSD 2TB. Capacity options differ: Corsair EX400U 1TB is 1TB while Seagate One Touch SSD 2TB is 2TB. The Corsair EX400U 1TB uses USB4 while the Seagate One Touch SSD 2TB uses USB 3.2 Gen 2.
Which is faster, Corsair EX400U 1TB or Seagate One Touch SSD 2TB?
The Corsair EX400U 1TB is faster with 3,300 MB/s read speeds compared to 1,030 MB/s for the Seagate One Touch SSD 2TB. That's a 220% speed advantage.
Which has better value, Corsair EX400U 1TB or Seagate One Touch SSD 2TB?
The Corsair EX400U 1TB scores higher (9.0 vs 7.8/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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