You cannot do this with a simple script.
You better use WinSCP .NET assembly from a PowerShell script.
Check this: https://winscp.net/eng/docs/script_local_move_after_successful_upload
Just replace PutFiles with GetFiles and Move-Item with $session.MoveFile.

hi
I am using a script to download files from the remote server and then move them to a backup folder.
I was using the below script but the problem is that when using " * " some times I move files that weren't downloaded as they were written after the download step has been invoked.
how can I retrieve the list of the files first then download and move that list

#script
get -transfer=ascii *
mv * "backup folder