• Directory of Internet terms
  • Backup or back up — Used as a verb, to back up means to copy a File or Folder from your computer to another Storage Device, e.g. a CD-ROM, as a precaution in case your Hard Drive fails or is infected by a Virus. A backup, used as a noun, or a backup copy describes a copy that you have made in this way. It is essential to back up new files and folders at regular intervals.