Windows 10: Trouble mounting/unmounting external HD

I have an external HD that I can mount and access okay, but after some amount of time something goes wrong with it to where I can access folders but they are all listed as empty, and attempting to unmount brings up a windows screen saying the drive is being used by a program. If I completely unplug the drive it is still listed, and can still access the folders but all are empty. Still won't dismount. Plugging it in and out repeatedly doesn't help at all. If I completely restart the machine it will be back to normal but after awhile it messes up again. Not sure how to fix..

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Windows 10 shutdown doesn't unmount despite......

Hi,

Thank you for the update and I apologize for the late response.

I appreciate if you could answer few questions to narrow down to the issue.

• 
  How exactly you are trying to unmount the drive. Is it through Command prompt or from Disk management?
  
• 
  What exactly happens when you try to unmount?
  
• 
  Did you receive any error message while trying to unmount?
  

I suggest you to try the steps given below and check if it helps.

Please close all the Windows before trying the steps.

• 
  Open Disk management.
  
• 
  Right-click the mounted drive that you want to remove, and then click
  Change Drive Letter and Paths.
  
• 
  Click Remove, and then click Yes.
  

Hope the information helps. Let us know if you need further assistance. We will be happy to help.

Thank you.

 

How to fix error unmountable boot volume

Hi James,

It is possible that you received the error UNMOUNTABLE_BOOT_VOLUME due to a damaged file system which failed to mount. This error also means that sub-system on machine failed to mount the boot volume. To efficiently assist you, we'd like
to gather more information:

• Have you made any recent changes prior to this issue?
• What is the exact error message you received?
• What troubleshooting steps have you done so far?

Meanwhile, we suggest that you you follow the steps shared by Michelle Her and
Billion Debbarma on this threads below to troubleshoot your concern:

• Windows 10 Unmountable Boot Volume Error Message And Automatic Repair
• Unmountable_boot_volume -Windows 10
  

Keep us posted if you need additional help.

 

UNMOUNTABLE BOOT VOLUME error

Hi Andre,

The challenge that you're experiencing when you got the error, UNMOUNTABLE_BOOT_VOLUME,
is due to a damaged file system that failed to mount. It also means that sub-system in the machine failed to mount the boot volume. To isolate the issue, kindly answer the following questions:

• When did you first encounter the issue?
  
• What are the troubleshooting steps have you done so far?
• How did you upgrade the device to Windows 10?

You can also follow the steps that was shared by Michelle Her and
Billion Debbarma on these threads to troubleshoot the issue:

• Windows 10 Unmountable Boot Volume Error Message And Automatic Repair
• Unmountable_boot_volume -Windows 10
  

Hope this helps and let us know if it works.