Why is explorer.exe keeping my USB harddrive busy?

  1.    #1

    Why is explorer.exe keeping my USB harddrive busy?


    Hi!

    I have a huge problem that I cant find solution for. When I eject my USB harddrive I get:
    Problem Ejecting USB Attached SCSI (UAS) Mass Storage Device

    This device is currently in use. Close any programs or windows that might be using the device and then try again.
    When I look it up with process explorer it is used by explorer.exe.



    There are 2 things that I noticed:
    1) These are all directories, not files.
    2) When I kill explorer and re-run it then it automatically opens these files again.
    3) When I plug that harddrive again, it again opens the same file handles.


    Can anyone tell me why is explorer doing this and how do I prevent it?

    Right now this is the only way I can unmount it:
    1) kill explorer
    2) windows - Remove USB device from command line - Super User

    I would love to unmount it via UI.
      My ComputerSystem Spec

  2. pepanee's Avatar
    Posts : 1,269
    Windows 10 Professional
       #2

    I'm confused, is the device empty? No files in there at all?

    If so, try Re-formatting that USB Device.

    1) Right click on it > Format...
    2) Make sure to Uncheck Quick format
    Click image for larger version. 

Name:	image.png 
Views:	25 
Size:	14.4 KB 
ID:	200435
      My ComputerSystem Spec

  3.    #3

    Problem Ejecting USB Attached SCSI (UAS) Mass Storage Device

    This device is currently in use. Close any programs or windows that might be using the device and then try again.
    Not sure it matters, but how are you Ejecting the Drive ... Eject from the Safely Remove in systray or File Explorer > Right Click on USB HDD > Eject ???

    You can check the USB HDD settings - Enable or Disable Disk Write Caching in Windows 10 | Windows 10 Tutorials

    Note: IIRC, I had to set my USB HDD to Quick Removal to stop that from happening. I still get the Safely Remove Icon and I eject from there.
      My ComputersSystem Spec

  4.    #4

    pepanee said: View Post
    I'm confused, is the device empty? No files in there at all?

    If so, try Re-formatting that USB Device.

    1) Right click on it > Format...
    2) Make sure to Uncheck Quick format
    Click image for larger version. 

Name:	image.png 
Views:	25 
Size:	14.4 KB 
ID:	200435
    No it's not empty. The handles on screenshot in my previous posts point to existing directories. It looks like windows is tryuing to remember what I last accessed or something.

    Eagle51 said: View Post
    Not sure it matters, but how are you Ejecting the Drive ... Eject from the Safely Remove in systray or File Explorer > Right Click on USB HDD > Eject ???
    Yes.

    You can check the USB HDD settings - Enable or Disable Disk Write Caching in Windows 10 | Windows 10 Tutorials
    I did not have it on.
      My ComputerSystem Spec


 

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