Auto writes data buffered in memory out to disk before logout

I have some embedded devices connected via SFTP. I need to power off the device after copying files via WinSCP. However, powering off the device directly will result in some data loss, so I need to run the "sync" command to write the copied files to the disk. Can I automatically execute the command to write the files to the disk when WinSCP disconnects?

You mean to execute some proprietary sync command over the FTP protocol/connection?

SFTP, I missed.

That's even more confusing for me – as there are no textual commands in the SFTP protocol.
Perhaps you mean sync shell command?

martin wrote:

That's even more confusing for me – as there are no textual commands in the SFTP protocol.
Perhaps you mean sync shell command?

Correct. I copied the description from the sync man page directly to avoid confusion with rsync.