That stuff in there is still nothing that makes any sense. You're going to need to decide what has to happen and write the code to do it, not just throw in stuff until it stops complaining.

A few hints: the directory to look in should be passed to find(), not copy(). copy() should be passed a filename (presumably returned from win_path) and the target directory. You'll need an if statement around the copy() call to make it only called for .TXT files.