Lexar JumpDrive M400 LJDM400128G-BNBNU 128GB USB 3.2 Flash Drive

Move backups, documents, and other files between a PC and a Mac with the Lexar JumpDrive M400. Its 128GB capacity gives you room to carry a range of files, while USB 3.2 Gen 1 supports read speeds of up to 150MB/s when connected to a USB 3.0 port.

A metal body and key-ring design make this drive easy to keep with your everyday essentials. It also features Lexar DataShield password protection, adding a security option for files you carry from one computer to another.

Technical overview

The M400 combines 128GB of storage with a USB connection that is backward compatible with USB 3.1, USB 3.0, and USB 2.0 devices. That makes it useful for transferring files across computers with different USB generations. It is compatible with PC and Mac systems, so it can serve as a shared file-transfer drive in a mixed-device household or workplace.

The stated read speed is up to 150MB/s, write speeds are lower, and actual transfer performance can vary. USB 3.0 support is required for the stated maximum read speed. For routine backups or moving a folder of documents and photos, the high-speed interface helps make file access and transfers more convenient than relying on slower connection standards.

The black metal finish gives the drive a distinctive alternative to a basic plastic USB stick, and its key-ring design offers a practical way to keep it close at hand. Customer feedback often describes the drive as reliable and functional, with buyers also appreciating its storage capacity and speed. Some report that it can run warm during use, so give it room to breathe during longer transfers.

Getting the most from it

Use the M400 to carry working files between a home computer and a work computer, keep a portable copy of documents, or transfer photos and other files for backup. Its compatibility with PC and Mac systems makes it a practical choice when files need to move between both platforms. For the stated top read speed, connect it to a USB 3.0 port, the drive also works with USB 3.1 and USB 2.0 devices.

Lexar DataShield provides password protection for stored files. The encryption software is compatible with Windows 7, 8, and 10, and Mac OS X 10 and later. Consider that software compatibility when choosing a computer for setting up or using the protection feature.

Practical tips

Keep the drive attached to a key ring or stored with the items you use for work and backups, so it is easier to find when you need to move files. For a large transfer, use a USB 3.0 port when available and allow time for writing: the advertised 150MB/s figure applies to read speed, while write speeds are lower. The M400 suits people who want portable storage with a metal finish and a key-ring design, rather than choosing a drive solely by capacity.

Questions before you buy

Is the JumpDrive M400 compatible with both PC and Mac? Yes. It is listed as compatible with PC and Mac systems, and its USB connection supports USB 3.1, USB 3.0, and USB 2.0 devices.

Does it reach 150MB/s when writing files? The up-to-150MB/s figure is for reading. Write speeds are lower, and actual performance varies, USB 3.0 support is required for the stated maximum read speed.

Which systems support Lexar DataShield encryption software? The stated software compatibility is Windows 7, 8, and 10, plus Mac OS X 10 and later.

Is it worth it?

The JumpDrive M400 brings together 128GB of portable storage, broad USB backward compatibility, and a metal key-ring design in one everyday drive. It is a strong fit for carrying files between PC and Mac, keeping backups close by, and adding password protection with compatible systems. Choose it when you want a USB drive that combines practical file transfer with a durable-feeling metal design and a convenient way to keep it with your keys.