This command copies all files in the current project/workspace to a compressed backup file (with a ". bup" extension) stored in the same directory as the . prj file for the active project/workspace and presents the Backup Project Files dialog to display information regarding the created project backup file.
Having a backup copy of a project/workspace allows users to develop with the security of knowing that if something doesn't work as planned a working project/workspace can be restored using the Restore Project/Workspace command.