I don't think it is possible to tell XP they shouldn't be saved. But if you are administrator of that PC, you can delete them when these other persons don't need them anymore.
I assume this is happening in a company. Then - maybe - it isn't ''your'' computer, but the companies computer and the companies diskspace? If they don't provide you with enough diskspace for you to do your work ask your manager to order a bigger disk for you or reserve more disk space at the companies file server for you.
And why not contact the IT-staff with your problem? They configure both the server and your PC, so they should know about the details.
Good day all,
am using windows 2003 server as my DC and windows xp at my workstations. when anyone log on at my workstion with his or her username and password, the person profile and files are save on my workstation. how can i stop saving to my workstation as this is consuming my hard disk space.