I can not find any method of saving attachments. Can anyone help?

I know if you click on a jpg or pdf etc it will open. That is not the same as saving an attachment. When I have a file emailed to me I want to save it to a specific location. It shouldn't matter what the file is. Man I hope the answer isn't the Pre can't do that. That would be pretty dumb.

Specifically it is a GPX file. GPX mapper wants the file in the document list.