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External SSDs

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Corsair EX400U 1TB vs OWC Envoy Pro FX 4TB

Compare Corsair EX400U 1TB and OWC Envoy Pro FX 4TB 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 →

OWC

OWC Envoy Pro FX 4TB
8.9/10

4TB of Thunderbolt 3 storage in an aluminum unibody barely larger than the 1TB. The Envoy Pro FX 4TB is a niche-of-one — buyers typically pay the premium for video editing workflows where 4000 MB/s sustained links plus 4TB of room actually matter.

Thunderbolt 3 + 4TB
Aluminum unibody
2800 sustained writes
Check on Amazon →

Spec Comparison

Spec
Corsair EX400U 1TB
OWC Envoy Pro FX 4TB
Read Speed
3.3 GB/s ✓
2.8 GB/s
Write Speed
3.0 GB/s ✓
2.8 GB/s
Capacity
1 TB
4 TB ✓
Interface
USB4
Thunderbolt 3
Endurance (TBW)
600 TB
2,400 TB ✓
Warranty
5 Years ✓
3 Years
Score
9.0/10 ✓
8.9/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, Corsair EX400U 1TB or OWC Envoy Pro FX 4TB?
The Corsair EX400U 1TB scores 9.0/10 compared to 8.9/10 for the OWC Envoy Pro FX 4TB. Our expert analysis favors the Corsair EX400U 1TB for its superior speed.
What's the difference between Corsair EX400U 1TB and OWC Envoy Pro FX 4TB?
The key differences: The Corsair EX400U 1TB offers 3,300 MB/s reads vs 2,800 MB/s for the OWC Envoy Pro FX 4TB. Capacity options differ: Corsair EX400U 1TB is 1TB while OWC Envoy Pro FX 4TB is 4TB. The Corsair EX400U 1TB uses USB4 while the OWC Envoy Pro FX 4TB uses Thunderbolt 3.
Which is faster, Corsair EX400U 1TB or OWC Envoy Pro FX 4TB?
The Corsair EX400U 1TB is faster with 3,300 MB/s read speeds compared to 2,800 MB/s for the OWC Envoy Pro FX 4TB. That's a 18% speed advantage.
Which has better value, Corsair EX400U 1TB or OWC Envoy Pro FX 4TB?
The Corsair EX400U 1TB scores higher (9.0 vs 8.9/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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