Corsair

Corsair EX400U USB4

Model: CSSD-EX400U1TB

9.2/10

Capacity	1TB
Interface	USB4
Form Factor	External
Read Speed	4,000 MB/s
Write Speed	3,600 MB/s
Endurance (TBW)	700 TB
Warranty	5 Years

Overview

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.

Professional Creator Analysis

Professional-grade USB4 storage with 4.0 GB/s reads and 3.6 GB/s writes — the Corsair Corsair EX400U USB4 keeps your creative workflow moving.

Professional Transfer Speeds

4.0 GB/s reads and 3.6 GB/s writes put this drive in elite territory. A 50GB file — think a Premiere Pro project folder with proxies — transfers in ~14 seconds, and a 100GB Lightroom catalog takes ~28 seconds. That's direct-edit performance without internal storage constraints.

Built for Sustained Workloads

700 TBW endurance covers moderate daily use across a multi-year lifespan. A 5-year warranty backs this drive, signaling manufacturer confidence in its longevity.

Ideal for

Data scientists managing large training datasets on the go
After Effects and motion graphics artists rendering directly to external storage
Creative pros who shuttle work between Mac, PC, and iPad

Sustained write workloads can push controller temperatures past 70°C, triggering thermal throttling that reduces throughput by 30-40%. Full metal enclosures manage heat better than slim plastic designs.

USB4 delivers the bandwidth needed for seamless playback and editing of high-bitrate media directly from the drive — no file transfer required.