What is a backup and why do I need it?

Data backup is the saving of your files in a location remote from your computer. We perform data backup to protect against cases in which our files are lost or destroyed from our primary computers. If we have our files saved in reserve on a backup disk, then we can restore our files to our computer in the case of a crash or loss of data. This is important to anyone who uses a computer as there are some files that are simply irreplaceable, and if they are lost then they are lost forever.Backups are useful primarily for two purposes. The first is to restore a state following a disaster (called disaster recovery). The second is to restore small numbers of files after they have been accidentally deleted or corrupted.