Cannot safely remove my USB KEy

[Damien Vandame]

Hi everybody, I'm a newbie here and maybe the issue has already been discussed, sorry I didn't find it.
After I have dismounted the crypted disk, I want to remove my USB key, but I get a message telling me that it cannot be removed safely due to open files or process or something like that. I know I have closed every open file, and I have dismounted the crypted drive, so what can I do? Any hidden process? I looked in the task manager, but I could find any process or service containing the word Vera
Thanks for anybody who can help.

[Mounir IDRASSI]

Hi,

If you have written data to the VeraCrypt volume, then this data is not
immediately flushed to disk because Windows keeps it in an internal
buffer and it is written to disk after a while. That's why the menu to
eject the USB key will return this message even if there is no
application using the volume. In general, Windows flushes the internal
buffers after few minutes but the time depends on the size of the
written data and the type of the disk. We can not control this buffer
flush delay from VeraCrypt because it is a system behavior but there are
some ideas to help in this:

- One tip to speed up the flush is to mount the disk as a removable
media in VeraCrypt (click the Option button and then check the box
"Mount volume as removable media."). In this case, Windows tends to
flush data more quickly to the disk. Does it work for you?
  - There is a Microsoft tool that allows to flush the buffer of disk
manually. It's called Sync and it's available on
https://docs.microsoft.com/en-gb/sysinternals/downloads/sync. This
article explains how it works:
https://www.trishtech.com/2013/12/flush-data-to-disks-with-sysinternals-sync/.

I hope this will help.

[Enigma2Illusion]

Here is the current link to SysInternal's Sync.

https://docs.microsoft.com/en-us/sysinternals/downloads/sync