by Stuart Mealor.
Hi Erika
There's no such thing as "the backup filesof users"
Are you talking about the automated backups of your Moodle site, or the Backups created by Teachers of their Courses ?
Site Administrators can see the location of the Backups (Moodle 2.x) by looking in the Settings Block at Site administration > Courses > Backups > Automated backup setup.
The "Save to" option specifies where the Backups are saved.Exactly where this is will depend on your Moodle server, and whether you are hosting internally or externally. But this option does tell you the location.
Stuart.