1. Introduction
The Lexar JumpDrive M400 USB 3.2 Gen 1 Flash Drive is designed for efficient file transfer and storage expansion. It offers high-speed performance and a durable design for portable data management. This manual provides instructions for setting up, operating, maintaining, and troubleshooting your device.
2. Key Features
- High-speed USB 3.2 Gen 1 performance for faster file transfers.
- Durable metal design for enhanced longevity.
- Lexar DataShield for password protection and file security.
- Backward compatible with USB 3.1, USB 3.0, and USB 2.0 devices.
- Compatible with both PC and Mac systems.
3. Setup
3.1 System Requirements
- Operating System: Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10, Windows 11, or macOS.
- Available USB port (USB 3.2 Gen 1 for optimal performance, compatible with USB 3.1/3.0/2.0).
3.2 Connecting the Flash Drive
- Locate an available USB port on your computer (PC or Mac).
- Insert the Lexar JumpDrive M400 into the USB port. The drive is plug-and-play and should be automatically recognized by your operating system.
- Once recognized, the drive will appear as a removable storage device in your computer's file explorer (Windows) or Finder (macOS).

Image: The Lexar JumpDrive M400 flash drive connected to a laptop, illustrating its compact design.
4. Operating Instructions
4.1 Transferring Files
- Open the Lexar JumpDrive M400 in your computer's file explorer or Finder.
- Drag and drop files or folders from your computer to the flash drive, or vice versa.
- For optimal transfer speeds, ensure you are using a USB 3.2 Gen 1 compatible port. The drive supports read speeds of up to 150MB/s.

Image: A visual representation of the speed difference between USB 3.2 Gen 1 and USB 2.0, highlighting the faster transfer rates of the JumpDrive M400.
4.2 Lexar DataShield (Security Software)
The Lexar JumpDrive M400 includes Lexar DataShield software for password protection, helping to secure your files with 256-bit AES encryption. To use this feature:
- Access the pre-loaded DataShield software on the drive.
- Follow the on-screen instructions to set up a secure vault and password.
- Store sensitive files within the encrypted vault for enhanced security.

Image: The flash drive positioned in front of a laptop screen displaying a shield and lock icon, symbolizing data protection.
5. Maintenance
5.1 Safe Removal
Always safely eject the flash drive before removing it from your computer to prevent data corruption.
- Windows: Click the "Safely Remove Hardware and Eject Media" icon in the system tray, then select the Lexar JumpDrive M400.
- macOS: Drag the drive icon from the desktop or Finder sidebar to the Trash, or right-click (Control-click) the drive icon and select "Eject."
5.2 Physical Care
The JumpDrive M400 features a durable metal design. To maintain its condition:
- Avoid exposing the drive to extreme temperatures or moisture.
- Keep the USB connector clean and free from debris.
- Store the drive in a safe place when not in use to prevent physical damage.

Image: The Lexar JumpDrive M400 resting on a textured, dark surface, highlighting its robust metal construction.
6. Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Drive not recognized by computer. |
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| Slow transfer speeds. |
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| DataShield password forgotten. | Forgotten password for encrypted vault. | Lexar DataShield does not offer a password recovery option. If the password is lost, data in the encrypted vault may be inaccessible. Ensure you keep a record of your password in a secure location. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | M400 |
| Item Model Number | LJDM400128G-BNBNU |
| Memory Storage Capacity | 128 GB |
| Hardware Interface | USB 3.2 Gen 1 |
| Read Speed | Up to 150 MB/s |
| Connectivity Technology | USB |
| Color | Black |
| Item Weight | 0.16 ounces |
| Package Dimensions | 4.92 x 3.46 x 0.35 inches |
| Manufacturer | Lexar International |
8. Official Product Video
Video: An official product video from Lexar International showcasing the features and usage of the Lexar JumpDrive M400.
9. Warranty and Support
For warranty information, technical support, or additional product details, please visit the official Lexar website. Lexar also offers optional data recovery plans for purchase, providing extended protection for your stored data.
- Manufacturer: Lexar International
- Optional Protection Plans:
- 2-year Photo and Data Recovery Plan
- 3-year Photo and Data Recovery Plan
- Online Support: Refer to the official Lexar website for the most current support resources and contact information.





