How to Troubleshoot Error 0X800701B1 on Windows 10 Computer

In everyday life, we often need to transfer files from our computer to an external hard drive or USB flash drive. Unfortunately, some users get error code 0x800701B1 when transferring files, and it usually comes with the following error message:

An Unforeseen error prevents you from copying the file. If you keep getting this error, you can use the error code to get help in solving the problem. Error 0x800701B1: A non-existent device was specified.

There can be several reasons for this error. If you encounter the same problem, don’t worry. Here are a few possible solutions that you can try one by one to solve the problem.

What causes the error code 0X800701B1?

Insufficient PSU power: If you have an average PSU and many connected devices that just consume power, you should consider that your power supply may not be enough to power all the devices. In this case, you can solve the problem by upgrading your power supply or unplugging some unimportant devices.

Incompatible driver: According to some concerned users, you can expect this error code if you are using a generic driver for an external drive that causes this error code. In this case, you can solve the problem by reinstalling the appropriate driver.

Insufficient USB 2.0 port: Depending on the type of hard drive/SSD with which this problem occurs, you may need to connect it to a USB 3.0 port to provide the necessary data transfer speed and performance.

How to repair the error code 0X800701B1?

Reset the USB flash drive driver

  1. Right-click on Windows and select Device Manager.
  2. Now expand the USB serial bus controllers or disk drives and right-click on the USB drive.
  3. Then select Properties and click on the Drivers tab.
  4. Now write down the driver you are currently using and click Update Driver.
  5. Then select the Search for drives on your computer and open the Select from a list of available drivers on your computer option.
  6. Now click Next and select any driver, but not the one that is currently installed.
  7. Then click Next and let the driver installation complete.

Take control of the problem drive in the security settings

  1. Right-click on Windows and open File Explorer.
  2. Now select This Computer in the left pane and right-click on the USB drive in the right pane.
  3. Then select Properties and click on the Security tab.
  4. Now click Advanced at the bottom of the screen and click Edit next to the Owner entry.
  5. Then click Advanced at the bottom left of the screen and select Search Now.
  6. Click the Edit button under Advanced Security Settings.
  7. Now double-click your user name and click OK.
  8. Then turn on the Replace all subordinate object permission records with this object’s inherited permission records option and apply the changes.

Reinstalling the device drivers

  1. Press the Windows + R keys to open the Run dialog box.
  2. Then type “devmgmt.MSC” in the text box and press Enter to open the Device Manager.
  3. In Device Manager, expand the drive drop-down menu, right-click on the drive that is causing the error code, and select Remove Device.
  4. Confirm that you want to remove the driver for the drive, then wait for the process to complete. This will remove the current driver and Windows will switch to the universal driver the next time your computer reboots.
  5. Repeat the action that caused the 0x800701b1 problem after the next boot and see if the problem is resolved.

Check the new hard disk drive

  1. Right-click on Windows and select Disk Management.
  2. Now expand the Action menu and select Scan disk.
  3. Once the scan is complete, check that the previous error is no longer present on the system.

Frequently Asked Questions

The error 0X800701B1 "A non-existent device was specified" is a Windows 10 problem that indicates that the disk you are trying to access or copy does not exist. This error usually occurs when the computer cannot copy or transfer data to or from the disk.

  1. Open Settings.
  2. Click on Update and security.
  3. Click on Troubleshooting.
  4. Select the troubleshooter that corresponds to the hardware on which the problem is occurring.
  5. Click Run Troubleshooter.
  6. Follow the instructions on the screen.

  1. Use a different USB port.
  2. Remove other devices.
  3. Update or reinstall the hard disk drive drivers.
  4. Limit the size of the files to be transferred.
  5. Replace the external hard disk drive.