Default setting of path for downloading to excel sheet

Can you advise me if I can change my settings so that when I save reports from SAP, the system default is some X//PROJ/....... instead of the default it is currently using. i.e., after the output is displayed, and going for SYSTEM -> LIST

-> SAVE -> LOCAL FILE and then selecting the spreadsheet radiobutton it asks for the path to store the file. In that path,the default one should be X//PROJ/.......

Thanks in Advance.