I have a friend who sent himself an excel file to his yahoo email account at home. He then went home and opened the email and double clicked on the attachment which was the excel file. He did some changes to the excel file and clicked on save. He closed out excel and then started a new email and wanted to email himself back the excel file he just worked on and send it to his work email. Problem is he has no idea where the file is. Does yahoo open a temporary excel program or something like that? Is the file somewhere on the computer?