OSError：[错误1]操作不允许shutil.move

So I'm trying to copy a file from my boot drive to an external using python. Because of this, os.rename is not an option (I would get a cross device error). I decided to try and use shutil.move but then this throws a OSError 1, claiming that the operation is not permitted on it's internal call of os.chmod. The interesting thing is that the directory it is moving to has permissions 777. The call is as follows:So I'm trying to copy a file from my boot drive