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External SSDs

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Corsair EX400U USB4 vs SanDisk Extreme Portable 1TB

Compare Corsair EX400U USB4 and SanDisk Extreme Portable 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
Check on Amazon →

SanDisk

SanDisk Extreme Portable 1TB
8.5/10

The non-Pro Extreme is the lower-cost sibling — same 1050 MB/s rated read and IP55 rugged body, but writes top out well below Extreme Pro on sustained workloads. A solid buy when the write-speed gap doesn't matter (game consoles, file transfer, backup) but the rugged rating does.

IP55 rugged body
Same 1050 read as Extreme Pro
Cheaper than Pro by a wide margin
Check on Amazon →

Spec Comparison

Spec
Corsair EX400U USB4
SanDisk Extreme Portable 1TB
Read Speed
4.0 GB/s ✓
1.1 GB/s
Write Speed
3.6 GB/s ✓
1.0 GB/s
Capacity
1 TB ✓
1 TB
Interface
USB4
USB 3.2 Gen 2
Endurance (TBW)
700 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
8.5/10
Total Wins
6 wins
0 wins

Frequently Asked Questions

Which is better, Corsair EX400U USB4 or SanDisk Extreme Portable 1TB?
The Corsair EX400U USB4 scores 9.2/10 compared to 8.5/10 for the SanDisk Extreme Portable 1TB. Our expert analysis favors the Corsair EX400U USB4 for its superior speed.
What's the difference between Corsair EX400U USB4 and SanDisk Extreme Portable 1TB?
The key differences: The Corsair EX400U USB4 offers 4,000 MB/s reads vs 1,050 MB/s for the SanDisk Extreme Portable 1TB. Capacity options differ: Corsair EX400U USB4 is 1TB while SanDisk Extreme Portable 1TB is 1TB. The Corsair EX400U USB4 uses USB4 while the SanDisk Extreme Portable 1TB uses USB 3.2 Gen 2.
Which is faster, Corsair EX400U USB4 or SanDisk Extreme Portable 1TB?
The Corsair EX400U USB4 is faster with 4,000 MB/s read speeds compared to 1,050 MB/s for the SanDisk Extreme Portable 1TB. That's a 281% speed advantage.
Which has better value, Corsair EX400U USB4 or SanDisk Extreme Portable 1TB?
The Corsair EX400U USB4 scores higher (9.2 vs 8.5/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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