Corsair EX400U 2TB USB4 Portable External Type-C SSD – Up to 4,000MB/s Read, 3,600MB/s Write, USB 3.2 Gen2 2x2, Plug and Play…
Best for
Best Thunderbolt 4 / USB4 speed
Amazon rating
Amazon aggregate — one input among many in the Verdict Score
Current price
$329.99
Updated May 13, 2026 · 1 min read
Synthesis sources
Methodology →The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Corsair EX400U is being framed as a headline-grabbing speed leader rather than a settled recommendation. Multiple YouTube reviews and the r/mac discussion describe it as the 'world's fastest native USB storage,' targeting 4,000MB/s read and 3,600MB/s write over USB4 — speeds that genuinely outpace every 20Gbps drive in this roundup. The MagSafe-compatible design and bundled 40Gbps cable also drew positive attention.
What reviewers liked
- Fastest rated speeds in this roundup (4,000MB/s read / 3,600MB/s write) over USB4
- Includes a 40Gbps cable in the box — a real cost saver
- MagSafe-compatible design for iPhone 15/16 attachment
- Backward compatible across Thunderbolt 4 and USB 3.2 Gen 2x2
Where it falls short
- No high-tier expert review (Tom's Hardware, Wirecutter, RTINGS) in our source pool yet
- r/mac thread reports MacBook Pro 14 compatibility failure
- r/macmini commenters flagged concerns about chassis durability
- Lower Amazon rating (4.2) than Samsung and Crucial alternatives
- Premium price ($329 for 2TB) versus established 20Gbps competition
Across the reviewers we read, the Corsair EX400U is being framed as a headline-grabbing speed leader rather than a settled recommendation. Multiple YouTube reviews and the r/mac discussion describe it as the 'world's fastest native USB storage,' targeting 4,000MB/s read and 3,600MB/s write over USB4 — speeds that genuinely outpace every 20Gbps drive in this roundup. The MagSafe-compatible design and bundled 40Gbps cable also drew positive attention.
However, the signal pool here is thinner and lower-trust than for the Samsung and Crucial drives. We did not find a high-tier expert review (Tom's Hardware, RTINGS, Wirecutter, PCMag) in the data set. r/mac surfaced a thread about a MacBook Pro 14 failing to recognize the drive, and r/macmini commenters flagged concerns about chassis fragility and 'feels fragile and made of plastic.' Amazon's 4.2-star average across 820 reviews is the lowest of our top picks.
The verdict from the consensus we read: if you have a Thunderbolt 4, Thunderbolt 5 or USB4 host and want the fastest portable SSD currently shipping, the EX400U is the obvious pick — but the reliability and long-term track record have not yet been established the way they have for Samsung's T-series.
- Feature 1
- External SSD with USB4 Connection: Leverage the incredibly high bandwidth of USB4 to move large files for tasks like video and photo editing in seconds.
- Feature 2
- Lightning-Fast Speeds: Delivers data speeds of up to 4,000MB/sec sequential read and up to 3,600MB/sec sequential write.
- Feature 3
- Compatible with USB Type-C: Connect via USB Type-C, Thunderbolt 4 and higher for wide compatibility*. *Performance varies by capacity. Maximum performance requires USB4 or higher connection.
- Feature 4
- Compact Form Factor: Small form factor allows you to take the EX400U with you for high-performance storage on the go.
- Feature 5
- Simple Plug-and-Play Setup: Easy to use right out of the box with a single connection for power and data on PC or Mac.
Corsair USB4 external SSD boasts speeds up to 4,000 MB/s ... Corsair EX400U 2TB Portable SSD Review - World's Fastest Native USB Storage.
22 votes, 74 comments. Pros I've seen : Read/Write speed up to 4GB/s, Cross OS, MagSafe compatible. Cons : Looks to be fragile and made of ...
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“Corsair EX400U 2TB SSD Review” · 4000MB/s USB4 ...
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