This property will contain relative path (as seen by the
user) to the file currently being transferred, or to the
file that was last transferred. To get full (resolved) path
to the file, you can use User.ResolvePath(User.TransferFilename)
statements.
TransferFilename will not be cleared by the component
until new transfer (either upload or download) is initiated
by the user. You can clear/set it by yourself, of
course.