Editing Computer file (section)

==Backup==
{{Main|Backup}}
When computer files contain information that is extremely important, a ''[[back-up]]'' process is used to protect against disasters that might destroy the files. Backing up files simply means making copies of the files in a separate location so that they can be restored if something happens to the computer, or if they are deleted accidentally.

There are many ways to back up files. Most computer systems provide utility programs to assist in the back-up process, which can become very time-consuming if there are many files to safeguard. Files are often copied to removable media such as writable CDs or cartridge tapes. Copying files to another hard disk in the same computer protects against failure of one disk, but if it is necessary to protect against failure or destruction of the entire computer, then copies of the files must be made on other media that can be taken away from the computer and stored in a safe, distant location.

The [[grandfather-father-son backup]] method automatically makes three back-ups; the grandfather file is the oldest copy of the file and the son is the current copy.