On the following line ftp. Storbinary('STOR ' + dest_dir+files, open(Origin_dir+files, "rb"), 1024) you open a file, but you don't keep a reference to it and close it. On Windows (I assume you are running this on Windows), a file can not be deleted while a process has it open.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.