Lexar 128GB JumpDrive M400 Flash Drive, 150MB/s Read, USB 3.2 Gen 1
Bottom line: The Lexar 128GB JumpDrive M400 Flash Drive ($20.99 on Amazon as of 2026-10-21 16:14 UTC): Up to 150MB/s read speed over USB 3.2 Gen 1; main trade-off: lexar specifies only read speed; write speed is not listed.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Up to 150MB/s read speed over USB 3.2 Gen 1
- ✓ 128GB capacity for documents, photos and portable backups
- ✓ Metal housing with built-in key ring loop for carrying
- ✓ Lexar DataShield password protection for stored files
- ✓ Works with PC and Mac; backward compatible down to USB 2.0
Cons
- ✗ Lexar specifies only read speed; write speed is not listed
- ✗ 150MB/s read trails portable SSDs for very large transfers
- ✗ Runs at USB 2.0 speeds when plugged into older ports
- ✗ DataShield protection depends on setting up Lexar's software
Manufacturer description
The Lexar JumpDrive M400 is a 128GB USB 3.2 Gen 1 flash drive for anyone who moves files between computers every day. It reads at up to 150MB/s, so large folders, photo libraries and installers copy off the drive much faster than they would from an older USB 2.0 stick. You spend less time watching a progress bar. The M400 has a metal housing with a built-in key ring loop. You can clip it to your keys or bag and keep it with you. With 128GB of space you can carry documents, media and portable backups on one drive instead of several. Lexar DataShield adds password protection, which helps keep…
SpecPicks Verdict
SpecPicks scored Lexar 128GB JumpDrive M400 Flash Drive using a rating × review-volume × price-fit model applied to published specs and reviews across the PC & gaming hardware category. Lexar's PC & gaming hardware lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for PC & gaming hardware of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How fast is the Lexar JumpDrive M400 128GB?
Lexar rates the M400 for read speeds of up to 150MB/s over USB 3.2 Gen 1. It does not list a write speed, so check the product listing if write performance matters to you.
Will the JumpDrive M400 work in a USB 2.0 or USB 3.0 port?
Yes. The drive is backward compatible with USB 3.1, USB 3.0 and USB 2.0 devices. In older ports it runs at that port's maximum speed rather than the full USB 3.2 Gen 1 rate.
Does the Lexar M400 work with both Mac and Windows?
Yes. Lexar lists the JumpDrive M400 as compatible with PC and Mac systems.
Can I password-protect files on the JumpDrive M400?
Yes. The drive supports Lexar DataShield, which adds password protection for the files you store on it. Setup is done through Lexar's software.
Is the M400 durable enough to carry on a keychain?
The M400 has a metal body with a built-in key ring loop, so it is designed to clip onto your keys or bag. Check the product listing for current warranty terms.
Key Features
- Transfer files with style and USB 3.2 Gen 1 performance
- As stylish as it is durable
- Protect your files with Lexar DataShield
- USB 3.2 Gen 1 enabled; backwards compatible with USB 3.1 / USB 3.0 and 2.0 devices
- Compatible with PC and Mac systems
Full Specifications
| Brand | Lexar |
|---|---|
| Color | Black |
| Model Name | M400 |
| Read Speed | 150 megabytes_per_second |
| Write Speed | 150 |
| Connectivity | USB |
| Model Number | LJDM400128G-BNBNU |
| Compatibility | PC, Mac |
| Mfr Part Number | LJDM400128G-BNBNU |
| Number of Items | 1 |
| Number of Packs | 1 |
| Special Feature | USB 3.2 |
| Flash Memory Type | USB |
| Compatible Devices | PC, Mac |
| Hardware Interface | USB 3.2 Gen 1 |
| Additional Features | USB 3.2 |
| Warranty Description | Five-year limited warranty |
| Connectivity Technology | USB |
| Memory Storage Capacity | 128 GB |
| Hardware Connectivity Technology | USB 3.0 Micro B, USB 3.0 Type-A |
Ready to buy?
Lexar 128GB JumpDrive M400 Flash Drive, 150MB/s Read, USB 3.2 Gen 1 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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