Backup refers to the process of copying files and databases to ensure that these are preserved even if there are equipment failures. Large businesses will always have backup provisions ready; even small businesses ensure that backups are regularly done to avoid data loss. For the personal computer user too, backup is essential but it is mostly neglected. You must understand that even the most dependable machine is liable to get destroyed in the event of a natural catastrophe; so, professionals always advise clients to get their data backed up in two or three locations. It is also advisable to keep backups in separate locations to avoid them from getting damaged.
You can create backups of files by using commands of the operating system; alternately, you can buy special purpose backup utilities. Since backups typically compress data, you will need to maintain fewer disks for backups. Most enterprises will have complete backup solutions which guarantee storage on removable devices, automatic backups to remote or offsite storage, provisions for data compression, auto scheduling to enhance reliability of backups.