Corsair EX400U Review
Corsair EX400U is a USB4 40Gbps portable SSD whose strongest case is high-end transfer speed on a correctly matched host. Confirm the host interface and live price before buying.
At a Glance
This model is best suited to creators and power users with a matching high-bandwidth host who move large project files. Its strongest buying points are corsair EX400U uses USB4 40Gbps with a stated up to 4,000/3,600 MB/s ceiling, corsair EX400U is offered across 1TB–4TB, and corsair EX400U carries this enclosure claim: magnetic; no IP rating stated.
Technical Assessment
The EX400U’s MagSafe-compatible magnetic ring is a genuine differentiator among USB4 drives in this shortlist, letting it snap directly onto a compatible iPhone for direct-to-drive recording, though its 4,000/3,600 MB/s rated speed trails the SanDisk Extreme PRO’s USB4 numbers slightly.
Performance
Corsair EX400U is rated by its manufacturer at up to 4,000/3,600 MB/s. No directly captured same-host measurement was retained for this model, so its advertised peak is not treated as a benchmark.
Reliability and Ownership
Corsair EX400U: No exact-model systemic failure pattern established from sources captured in this run; absence of evidence is not proof of absence. Its stated warranty is 3 years; reconfirm wording and eligibility at purchase.
Buyer Fit and Trade-Offs
Best For & Key Strengths
Best For
- Creators and power users with a matching high-bandwidth host who move large project files.
Key Strengths
- Corsair EX400U uses USB4 40Gbps with a stated up to 4,000/3,600 MB/s ceiling
- Corsair EX400U is offered across 1TB–4TB
- Corsair EX400U carries this enclosure claim: magnetic; no IP rating stated
Not Ideal For & Key Trade-Offs
Not Ideal For
- Buyers whose computers only provide 10Gbps USB, where the premium interface cannot be fully used.
Key Trade-Offs
- Corsair EX400U transfer speed depends on the connected host port and workload
- Corsair EX400U had no stable US street-price snapshot during volatile NAND pricing
- Corsair EX400U lacked a safe exact-model numeric owner-review aggregate in this pass
Technical Specifications
| Interface | USB4 (40Gb), USB 3.2 Gen2x2 (20Gb), USB 3.2 Gen2 (10Gb); backward compatible to USB 3.0/2.0; Thunderbolt 4+ compatible |
| Rated | up to 4,000/3,600 MB/s |
| Capacities | 1TB–4TB |
| Durability | magnetic; no IP rating stated |
| Warranty | 3 years |
| Controller | Phison PS2251-21 |