If Windows shows the message “USB device not recognized,” the problem may be with the port, cable, driver, or the device itself. It can happen with USB drives, external hard drives, phones, and other USB devices.
Sometimes reconnecting the device is enough. Other times, Windows keeps showing the warning or the drive does not appear in File Explorer. In this guide, you will learn how to fix it in Windows 11 and Windows 10, starting with quick checks and then moving to more advanced solutions.
Before You Start: Do Not Format the USB Drive Yet
If the USB device contains important files, do not format it unless you already have a backup. When Windows does not recognize a USB drive, it may ask you to format the disk before using it, but that can make recovery harder if the drive has files you need.
Before trying advanced fixes, check the basics: try another USB port, test the device on another computer, and use another cable if it is an external hard drive, phone, or USB-C device. Do not initialize, format, or delete partitions if you need the files. If an external drive makes clicking noises or disconnects constantly, stop using it and consider data recovery options.
Why Windows Says “USB Device Not Recognized”
The USB device not recognized error means Windows detected a device connected to the USB port but could not communicate with it correctly.
This can happen because of a faulty USB port, a damaged cable, a USB hub, a corrupted driver, a power setting, or a problem with the device itself.
The right fix depends on what you see: the device may be completely undetected, appear as an unknown USB device in Device Manager, or show up in Disk Management but not in File Explorer.
1. Try Quick USB Fixes
Start with these simple checks before changing drivers or system settings.
- Disconnect and reconnect the USB device. Unplug the device, wait a few seconds, and connect it again. If it is a USB storage device, avoid removing it while files are being copied.
- Restart your computer. A restart can reload Windows services, USB controllers, and device drivers. After Windows starts again, reconnect the USB device.
- Try another USB port. If you are using a desktop PC, try a rear USB port instead of a front port. Rear ports are usually connected directly to the motherboard and may be more stable.
- Avoid USB hubs and adapters. Connect the device directly to the computer, especially if it is an external hard drive, card reader, or another device that needs more power.
- Try another USB cable. This is important for external hard drives, phones, cameras, and USB-C devices. Some cables only charge devices and do not transfer data.
- Test the USB device on another computer. If it works on another PC, the problem is likely related to your Windows installation, drivers, power settings, or USB ports. If it does not work anywhere, the USB device itself may be damaged.
2. Check If the USB Drive Appears in Disk Management
If your USB drive does not appear in File Explorer, it may still appear in Disk Management. This can happen when the drive has no letter assigned, has a damaged partition, or uses a file system Windows cannot read properly.
Use this step if the USB drive does not show up in This PC, Windows makes the connection sound but nothing appears, or an external hard drive is detected but not accessible. You can also check Microsoft’s guide to Disk Management in Windows if you need more details about this tool.
- To open Disk Management: Right-click the Start button and select Disk Management. Then, look for your USB drive in the lower section of the window.
Be careful here. Disk Management also shows your internal drives, recovery partitions, and system partitions.
When the USB drive appears without a drive letter
If the USB drive appears in Disk Management without a letter such as D:, E:, or F:, assign one manually. Right-click the USB volume, select Change Drive Letter and Paths, click Add, choose an available drive letter, and click OK. Then open File Explorer and check whether the drive appears under This PC.
When the drive appears as unallocated or not initialized
If the drive appears as Unallocated, Unknown, or Not Initialized, do not initialize or format it if you need the files. Doing so can erase or overwrite important drive information.
If the drive is empty or you do not need the data, you can create a new volume and format it. Only do this when you are sure there is nothing important on the device.
3. Check Device Manager for an Unknown USB Device
If Windows shows USB device not recognized, the device may appear in Device Manager as an unknown device, a USB Mass Storage Device, or an entry with a yellow warning icon.
To check it: Right-click the Start button, select Device Manager and expand these sections: Universal Serial Bus controllers, Disk drives, Portable Devices, Other devices.
Look for entries such as Unknown USB Device, Unknown Device, USB Mass Storage Device, Device Descriptor Request Failed, or any device with a yellow warning icon.
If you find one, continue with the next step to uninstall and reinstall the device driver.
4. Reinstall the USB Device Driver
A corrupted driver can cause Windows to stop recognizing a USB device. Reinstalling the device can force Windows to detect it again. Microsoft also explains how to update drivers through Device Manager if you want to review the official driver options.
Before changing drivers or USB controllers, you may want to create a restore point.
Open Device Manager, find the problematic USB device, right-click it, select Uninstall device, and confirm the action. Then disconnect the USB device, restart your computer, and connect it again.
Windows should try to install the driver again automatically.
Choose the entry that matches how the device appears in Device Manager. If it appears under Disk drives, uninstall it from there. If it appears as Unknown USB Device under Universal Serial Bus controllers, uninstall that entry instead.
If Windows does not reinstall the device automatically, you can force a new detection from Device Manager. Click your computer name at the top of the device list, open Action, select Scan for hardware changes, and then check whether the USB device appears normally.
5. Reinstall the USB Controllers
If only one USB device is not recognized, the problem may be with that device. But if several USB devices or ports fail, the issue may be with the USB controllers in Windows.
Open Device Manager, expand Universal Serial Bus controllers, and uninstall entries such as USB controller, USB Root Hub, or Generic USB Hub. Restart your computer and let Windows reinstall them automatically, then reconnect the device and check if it is recognized.
If you use a USB keyboard or mouse, keep in mind that it may stop responding during the process. If that happens, restart the computer with the power button or use the built-in keyboard or touchpad if it is a laptop.
6. Check USB Power Settings
Windows can turn off USB devices to save power. This is useful on laptops, but it can also cause USB devices to disconnect, stop responding, or fail to wake up correctly.
Turn off USB power saving in Device Manager
Open Device Manager, expand Universal Serial Bus controllers, right-click USB Root Hub or Generic USB Hub, and select Properties. In the Power Management tab, uncheck Allow the computer to turn off this device to save power and click OK. Repeat the same process for other USB Root Hub or Generic USB Hub entries.
If the Power Management tab does not appear for a specific entry, skip it and move to the next one.
Disable USB Selective Suspend
USB Selective Suspend allows Windows to suspend USB devices when they are not being used, but in some cases the device may not wake up correctly. To disable it, open the Start menu, search for Edit power plan, click Change advanced power settings, expand USB settings and USB selective suspend setting, and set it to Disabled. If you are using a laptop, set both On battery and Plugged in to Disabled, then click Apply, OK, and restart the computer.
7. Update Windows and USB Drivers
Windows updates can include driver fixes, compatibility improvements, and other hardware-related patches. Open Settings, go to Windows Update, click Check for updates, install any available updates, and restart your computer.
If you want more details about how updates work, check Microsoft’s Windows Update FAQ. On Windows 11, you can also go to Advanced options > Optional updates, where some driver updates may appear.
If Windows still does not recognize the USB device, check the manufacturer’s website for updated chipset, USB, BIOS, or motherboard drivers. This is especially useful if several USB ports are not working, the problem started after installing Windows, the laptop is missing manufacturer drivers, or USB-C ports and docking stations behave inconsistently.
Go to the support page for your laptop, motherboard, or desktop model and download the recommended drivers for your version of Windows. Avoid downloading drivers from random driver websites. Use the official manufacturer page whenever possible.
8. Check the USB Drive for Errors
Use this step only if the USB drive appears in File Explorer.
If Windows recognizes the drive but you cannot open files, copy data, or use it normally, the file system may have errors. Open File Explorer, go to This PC, right-click the USB drive, and select Properties. In the Tools tab, click Check under Error checking, then choose Scan and repair drive if Windows offers that option.
Wait until the process finishes before removing the drive. This option will not help if the USB device does not appear in File Explorer, so in that case use Disk Management and Device Manager first.
9. Repair Windows System Files
If USB devices still fail after the simpler fixes above, Windows system files may be damaged. You can use SFC and DISM to check and repair them. For a full walkthrough, see our guide on how to fix corrupted Windows system files with SFC /scannow.
Right-click the Start button, open Terminal (Admin) or Windows PowerShell (Admin), and run:
sfc /scannowWait for the scan to finish and restart your computer. If the problem continues, open Terminal (Admin) again and run:
DISM /Online /Cleanup-Image /RestoreHealthWhen the process finishes, restart your computer and test the USB device again.
Specific USB Device Cases
The fixes above cover most USB recognition problems, but some devices need a few extra checks.
If the USB Device Is an External Hard Drive
External hard drives may fail to appear because of power, cable, enclosure, or disk problems. Connect the drive directly to the PC, avoid unpowered USB hubs, try another cable or port, and check Disk Management to see whether it appears without a drive letter. If it makes clicking or beeping sounds, or disconnects repeatedly, stop using it and consider data recovery if the files are important.
If the USB Device Is a Flash Drive or Pen Drive
Try another USB port, test the drive on another computer, and check Disk Management to see whether it appears without a drive letter. If it does not work on any computer, the drive may be damaged. If the files matter, avoid formatting it or reconnecting it repeatedly.
If the USB Device Works on Another Computer
If the device works on another PC but not on yours, the problem is more likely related to Windows, USB ports, drivers, or power settings. In that case, focus on Device Manager, USB power settings, Windows Update, and USB drivers.
If the USB Device Does Not Work on Any Computer
If the device is not recognized on any computer, it may be physically damaged. If there are no important files on it, replacing it may be the easiest option. If the files matter, avoid formatting it and consider data recovery options.
How to Reduce USB Recognition Problems in the Future
You cannot prevent every USB issue, but these habits can reduce the risk:
- Use Safely Remove Hardware before disconnecting USB storage devices.
- Avoid removing a USB drive while files are being copied.
- Keep Windows and drivers updated.
- Use good quality USB cables.
- Avoid unstable USB hubs for external hard drives.
- Store flash drives away from heat, moisture, and physical pressure.
- Back up important files in more than one place.
USB drives can fail without warning. If the files matter, do not keep them only on one USB device. If you store sensitive files on a removable drive, you may also want to password protect a USB drive in Windows.
FAQ
Why does Windows say USB device not recognized?
Windows shows the USB device not recognized message when it detects a connected device but cannot communicate with it correctly. This can happen because of a faulty cable, bad USB port, corrupted driver, power setting, or a damaged device.
What should I do if my USB drive does not show up in File Explorer?
Open Disk Management and check if the drive appears there. If it appears without a drive letter, assign one. If it appears as Unallocated, Not Initialized, or asks to be formatted, do not make changes if you need the files.
Should I format a USB drive that Windows does not recognize?
Do not format the USB drive if you need the files. Formatting can erase data and make recovery harder. Only format it if you already have a backup or you are sure the files are not important.
