The issue: Lexar flash drive not recognized
“Please help. My Lexar 64GB USB flash drive cannot be recognized by my Windows 7
computer. It gives me this prompting message saying USB device not recognized. I
disconnected and then reconnected it and get another similar error, ‘The device you
connect to this computer malfunctioned, and Windows does not recognize it.’ What
does that mean? How could I make the Lexar flash drive detected and working? I have
important data on that USB drive, so don’t want to format Lexar flash drive.
Any advice will be appreciated. Thanks in advance.”
Lexar flash drives and thumb drives are popular among thousands of users due to its
high performance, the security property in particular. Therein, the Lexar JumpDrive
is one of the most popular flash drives. They are compatible with many operating
systems with easy set-up. Capacities vary from 32GB to 128GB, which are suitable for
lots of purposes. When the drive cannot be recognized, things must be trying.
Similar error messages on USB flash drive not recognized in Windows
USB flash drives are widely used during people’s daily life. It would be quite
annoying when these flash drives cannot be recognized. Some other users complain
that they also received following messages while connecting USB sticks.
One of the devices attached to this computer has malfunctioned, and Windows
does not recognize it. For assistance in solving this problem, click this
Unknown device, descriptor request failed, error code 43.
Drive did not load successfully.
USB Device Not Recognized or Malfunctioned.
The reasons for Lexar USB flash drive not working or not recognized are complicated
in different situations. Therefore, to fix the problem thoroughly, you may need to
try several ways to check out.
How to fix Lexar flash drive not recognized in different situations?
In the first place, you have definitely tried another port, a different USB drive, or
a different computer to test if it is the problem of your Lexar USB drive. If it is
a flawed or faulty flash drive, you can call the Lexar Support at 1-877-747-4031 for
technical support, or go to www.lexar.com, click on Support and there you can chat
with a Lexar agent for assistance with your Lexar drive.
Absolutely, you may want to try these fixes by yourself before contacting the
Enable USB ports in BIOS
First of all, you need to make sure that the Lexar flash drive is detected by the
computer BIOS (the basic input/output system), so that it can be detected by an
operating system. Here are detailed steps.
1. Shut down your computer, connect the Lexar flash drive to it and power on. Find
the “Pause Break” key on your keyboard and press it before the Windows logo
2. Then keep pressing F8 or another hot key to enter BIOS setup. Go Advanced > USB
ports with arrow key.
3. In USB ports, select USB support – FULL Initialization. Also check the “OS
Note that in some BIOS, you may need to go to Advanced > Onboard Devices or
Integrated Peripherals and press Enter. Select “USB Controller” and press “+” or “-”
to change the setting to “Enabled”.
4. Press F10 to save changes and exit. Restart your computer and check if the Lexar
USB drive is detected.
Update USB device driver
One possible reason is that the USB device software is not up-to-date. You can try
this method to get a latest USB device driver.
1. Run devmgmt.msc as administrator.
2. In Device Manager, navigate to “Universal Serial Bus controllers”, usually the
last one, and then “Generic USB Hub” > “Update Driver Software” or “Update
3. Select the first option “Search automatically for updated driver software” in the
next step to let Windows install the driver automatically.
4. Wait for the process completes. You can restart or reconnect the Lexar flash drive
to see if it is recognized.
Assign drive letter in Disk Management
In some cases, the flash drive won’t show up in Windows File Explorer. You may need
to assign a drive letter to that drive and make it usable.
1. Press Windows key + R to summon Run box. Type diskmgmt.msc and
2. In Disk Management, find your Lexar flash drive (it may show up with unallocated
space or asterisk) and right click it.
3. Select “Change Drive Letter and Paths…” from the menu.
4. In the pop up window, click “Change”. In the next window, choose a proper drive
letter for your Lexar flash drive and click OK.
Usually, the operation will be executed immediately. But you may also receive a
prompting message saying this operation may cause programs error. Mostly, it means
the program in your drive may not work when the installation path or shortcut
changed. Don’t be nervous if you only stored data on the USB drive.
Format Lexar flash drive with a correct file system
The unrecognized issue can also be caused by incorrect file system. In general, a
removable flash drive that is formatted with NTFS, FAT32, exFAT, or EXT3/4, etc.
will be recognized by Windows 7/8/10. In addition, a corrupted or damaged file
system can affect the recognizing of the Lexar flash drive, too. Common error would
volume does not contain a recognized file system”. Thus, finding a
professional USB formatting tool would be a good choice.
AOMEI Partition Assistant Standard is free
USB formatting utility that you could rely on. It will help you solve Lexar flash
drive not recognized issue by formatting it with a correct file system.
Aforementioned file systems are all available. Let’s get to know how to use it in
install and run AOMEI Partition Assistant Standard. Right click the unallocated
space of the Lexar flash drive and select “Format Partition”.
2. In the pop-up window, specify the volume label, choose file system and cluster
size if you want to.
3. Click “Apply” in the toolbar and then “Proceed” to execute the task.
4. Wait for it completes. Close the program, reconnect the flash drive or restart to
see if Windows could recognize the USB stick.
Some users want to get their data back after formatting, or some of them even don’t
want to format the drive at all. There are two advices here. One is sending Lexar
flash drive to professional repair center in the very first place. The other is to
try “Partition Recovery Wizard” of AOMEI
Partition Assistant Professional, the advanced edition of the Standard
It will help you recover lost or formatted partition on the condition that there is
no new data written. Format will rebuild the file system yet recover will get the
files back. Here are specific steps.
1. Install and run AOMEI Partition Assistant Professional. Click “Partition Recovery
Wizard” in the left side.
2. Select the lost partition and click on “Proceed”.
3. It is suggested to choose “Fast Search” first. If nothing found, choose the “Full
Search”. Click Next.
4. You’ll get following window if recovery completed. Click “Finish” to exit. You can
check files in the formatted partition in File Explorer.
When you find Lexar flash drive not recognized in Windows 7/8/10, you can try those
methods to remedy. Make it recognized for another use or to get crucial data back.
However, to protect important data, it is recommended to backup flash driveregularly.
AOMEI Partition Assistant has many other helpful features that could help you manage
your computer well. For example, you could merge
partitions without losing data to solve MBR primary partition number
limitation and partition
USB drive for different uses.