The EX400U has a simple, dense design: a square chassis with rounded corners, finished in matte silver-gray, measuring 0.5 by 2.5 by 2.5 inches (HWD) and weighing just 3.2 ounces. The Corsair logo adorns the top of the drive.
(Credit: Joseph Maldonado)
On the bottom, you’ll find a striking addition. The drive includes a MagSafe connector—the first I have seen on an SSD—that lets you attach the unit to compatible devices, such as an Apple iPhone 15 or later.
(Credit: Joseph Maldonado)
When the drive is connected to the phone via its USB cable, you can transfer content or even record video directly to the drive, freeing your phone’s storage space from filling up fast with high-res video. In this respect, it is like the PCMag Editors’ Choice Lexar Professional Go Portable SSD With Hub, which is designed to save 4K video in Apple’s ProRes format even as the iPhone shoots it. The Go provides a host of other features for iPhone videographers, but with some fundamental drawbacks. For one, it’s limited to USB 3.2 Gen 2 speed. Its capacity maxes out at 2TB. And the hub and its bundled extras substantially drive up the cost. With the EX400U, you don’t get all the extras. But you do get a faster drive with capacities up to 4TB, and the MagSafe connector for a simplified videography setup—and at a much better cost per gigabyte.
The EX400U’s USB Type-C port supports USB4 or Thunderbolt 4. The drive also comes with a 40Gbps USB-C cable that’s a foot long. Next to the port is a small status light.
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You can get the EX400U in 1TB, 2TB, and 4TB capacities. It costs more than a typical USB 3.2 Gen 2×2 SSD—it’s comparable in price to a base-capacity LaCie Rugged SSD4—but the EX400U ends up being more economical when you look at the 4TB version.
Corsair offers a three-year warranty on the EX400U, a common length for external SSD protection. The drive includes Corsair SSD Toolbox software, offering drive-control options such as secure erase and firmware updates.
