Product News — 11 Aug 2025
Ultra fast USB4 portable SSD.
Share with
Meet the Corsair EX400U 4 TB USB4 External SSD, a sleek and powerful storage solution engineered for creative professionals, media power users, and anyone requiring ultra fast, portable data access. Seamlessly blending lightning fast USB4 performance with exceptional versatility, this compact SSD delivers up to 4,000 MB/s sequential read and up to 3,600 MB/s sequential write speeds over its USB C interface.
Housed in a minimalistic 64 × 64 × 12 mm enclosure with an aluminum top and lightweight plastic sides, the EX400U weighs just 92 g, making it both robust and highly portable. Its standout feature is the creative use of a MagSafe compatible magnetic ring on the underside, enabling secure attachment to MagSafe enabled mobile devices such as recent iPhones, perfect for quick on the go file transfers or recording.
With backwards compatibility across USB C, USB 3.2 Gen2×2, and Thunderbolt 4 (and above), the EX400U offers broad device interoperability. Out of the box, it is preformatted in exFAT, ensuring immediate use with macOS, Windows, Linux, iPadOS, and iOS systems.
Designed for reliability, the drive operates within a temperature range of 0 °C to 70 °C, handles shock resistance up to 1,500 G, and offers a Mean Time Between Failures (MTBF) of 1.4 million hours. Power management is efficient, consuming as little as 4 to 4.5 W during active read and write operations. It also comes with a three year limited warranty, giving users added peace of mind.
The EX400U is designed to deliver outstanding transfer performance, with sequential read speeds reaching up to 4,000 MB/s and write speeds up to 3,600 MB/s. This level of speed makes it ideal for tasks such as moving large video projects, backing up high-resolution image libraries, or running applications directly from the drive without noticeable lag. Using a USB C connection, the drive works seamlessly with Thunderbolt 4 and later interfaces, ensuring that it can take full advantage of high-bandwidth ports on modern devices. For added flexibility, it remains backward compatible with older USB standards, making it easy to use across different computers and operating systems without worrying about adapters or complicated setup steps. This combination of speed and compatibility means you can count on consistently smooth performance whether you are at your main workstation, collaborating on site, or switching between multiple devices during a project.
The EX400U supports self monitoring and maintenance functions, offering tools such as SMART status reporting, TRIM command support, and automatic garbage collection. These technologies help maintain long term performance by tracking drive health, optimizing data storage, and managing leftover file fragments. This ensures the drive remains efficient and reliable over years of heavy use, which is especially important for professionals who depend on consistent performance and data integrity.
Its compact 64 × 64 × 12 mm design makes it an ideal companion for on the go professionals who need high performance storage they can carry anywhere without adding bulk to their bag or workspace. The drive’s lightweight build and durable materials ensure it can handle daily travel, quick setups, and frequent device changes with ease. The high speed interface is engineered not only for exceptional performance but also for broad compatibility across multiple platforms, from desktop workstations and laptops to tablets and mobile devices. Connecting is straightforward, just one cable provides both power and data transfer, eliminating the need for external power supplies or complicated setup steps. Out of the box, the drive works seamlessly with major operating systems, allowing users to start transferring files or working on projects within seconds. Whether you are editing large video files on location, expanding your device’s storage, or moving entire project folders between systems, the EX400U makes the process effortless and efficient.
The Corsair EX400U 4 TB USB4 External SSD showcases refined engineering, delivering desktop class speeds in a compact, mobile friendly package, enhanced by innovative features like MagSafe integration and broad compatibility. It is an ideal choice for professionals who demand performance, portability, and reliability in their external storage.
