Corsair EX400U 2TB
Score: 74/100
Amazon Basics LSPSSD1TB 1TB
Score: 74/100Rankings
The Corsair EX400U is an ultra-compact USB4 SSD delivering some of the fastest portable read speeds on the market and a unique MagSafe feature for iPhone creators, though it lacks ruggedness and full write-speed potential.
Amazon Basics' 1 TB portable SSD promises flagship-class speeds and an IP65 rating at a budget price. While the specs are impressive, actual performance depends on having a USB 3.2 Gen 2x2 host, and some users question long-term durability.
| Attribute | | |
|---|---|---|
2,048 GBbest | 1,000 GB | |
4,000 MB/sbest | 2,000 MB/s | |
3,600 MB/sbest | 2,000 MB/s | |
3 yearsbest | — | |
| ↓ lower better | 92 g | 52 gbest |
| ↓ lower better | 11.9 mm | 9.9 mmbest |
| ↓ lower better | 64.3 mm | 59.2 mmbest |
| ↓ lower better | 64 mm | 59.2 mmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(3) | ||
Interface | USB4 | USB 3.2 Gen 2x2 |
Sequential Read Speed (MB/s) | 4000 MB/s | 2000 MB/s |
Sequential Write Speed (MB/s) | 3600 MB/s | 2000 MB/s |
Storage(1) | ||
Storage Capacity (GB) | 2048 GB | 1000 GB |
Build & Design(4) | ||
Weight (g) | 92 g | 52 g |
Thickness (mm) | 11.9 mm | 9.9 mm |
Length (mm) | 64.3 mm | 59.2 mm |
Width (mm) | 64 mm | 59.2 mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the EX400U's groundbreaking speed, tiny form factor, and MagSafe integration, while noting the write-speed shortfall, modest endurance, and absence of encryption or rugged features.
Users love the lightning-fast transfers and iPhone attachment, but express concerns about write-speed limits, durability, and lack of encryption.
“fast file transfers”
“scam sellers heaven”
“Great value for the speed offered”
Professional editors view it as a compelling budget alternative with near-NVMe speeds, but warn that real-world performance hinges on a compatible host and note uncertainty around internal components.
Everyday users like the speed and IP rating, yet many report that advertised 2000 MB/s is rarely achieved and express concerns about reliability and regional spec variations.
