How To Find Which App Or Process Is Using A USB In Windows

[learninmypc]

It only takes seconds to safely remove a USB drive or an external hard drive. In Windows, you can eject a USB drive from the system tray or from File Explorer. In File Explorer, select a USB drive and go to the ‘Manage’ tab. Click the ‘Eject’ button to safely remove a drive. From the system tray, right-click the USB device icon and select the Eject option for the drive you want to remove. If all goes well, Windows will tell you it’s safe to remove a USB drive within seconds. There are exceptions to this of course. At times, Windows tells you it isn’t safe to remove a USB drive because it is in use by an app or a process. The message prompt doesn’t tell you which app or process is using a USB. Here’s how you can see what’s preventing Windows from safely ejecting a USB drive.
READ IT HERE

 

[DelJo63]

If this were Linux:

• lsof is a command meaning "list open files", which is used in many Unix-like systems to report a list of all open files and the processes that opened them.
  lsof - Wikipedia
  https://en.wikipedia.org/wiki/Lsof
  

it also works if there's a emulator like Cygwin installed

 

[learninmypc]

Thank you