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When I try to format a USB flash drive, I get an error message.

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Schlaffie:
I have found the problem.
Let's say the USB flash drive is drive F.
If drive F is open in the window of Multi Commander and I want to "format" via the context menu comes the message.
I can't safely remove drive F then either.

If drive C is open in the Multi Commander window and I right click on drive F at the top of the drive list and choose "format" from the context menu then the error message does not come.
I can then safely remove the F drive.

So Windows always considers drive F as in use when it is open in Multi Commander window, although no file operations are performed.

Mathias (Author):
Yes that is because file notification is active on the filesystem, So MC gets notified and refresh the view if anything is changed on the drive.
But there is no exclusive lock.. Windows will allow the device to be unmounted anyway

Schlaffie:
What can I do about it now?
It works with other file explorers too!
Only not with MC!

Mathias (Author):
I don't see it as it does not work.. You get a warning that something is using the device because of file notification.  But it does not prevent you from just clicking continue.
If you do not want to see a warning. then navigate away from the device before format

Windows can unsubcribe on file notification it self since it has full control of the shell. But MC is not build ontop of the shell. So MC does not know that the format tool have started.

Schlaffie:
Thanks for the detailed answer!

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