Keeping a backup of data in an external storage device such as a hard disk or a DVD ROM can protect against unwarranted loss of data. Movie enthusiasts may want to burn movies stored in the hard disk onto a DVD for convenience and to free up space on the hard drive of the computer. Converting the DVD to DivX makes the DVDs portable so they can be run on any platform. AcidRip can be used to convert DVDs to DivX. Before installing AcidRip on the Linux operating system, it is mandatory to install the necessary Xvid codecs to play DVDs and DivX/Xvid videos.