Backup in Office is a new one on me. If you are using Windows XP the backup feature is available if you click here
As far as I know you cannot backup directly to CDROM. You have to save to hard drive then burn to CD.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone