Freerdp and flash drives, how to extract correctly?

Question

linux

Help with this question, we use a terminal server on Windows and connect to it via freerdp, flash drives are configured, everything works, but when the flash drive is removed, the following pops up in the logs:

FAT-fs (sdb1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck

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The question arose, how to correctly unmount a flash drive if at the time of use we are in an RDP session and safe extraction is not available to us?