A favorite pastime of my coworkers is to send me a piece of information and then ask for it back a few days later. My current means of dealing w/ this is to find the email in which they sent me whatever spreadsheet it is that they need and then foreword it back to them. (If you just hit reply, the attached file isn't sent.) Someday, they will learn to use the search function built into Windows and I will be out of a job. This will happen sometime after my retirement or never.