[Zope] how to copy file from zope's folder to server's directory

hello~ At first,I upload a file(abc.prn) to my zope site. And then,I want to copy the file(abc.prn) form zope to server, but I don't know how to do. I want maintain the file completely.I don't want .zexp file. Can anybody tell me how to do? Thank you! -- MingFang Hiseh Postgraduate TamKang University Taiwan