Backup

 Backup is the process of the copying important data to another location to prevent their loss . Sometime programs and even entire operating system are copied , to be able to immediately continue working even when a computer breaks . There are three very good reasons to do regular backup :-

·       Against the user , who can accidentally delete some files or who can modify files and then change his mind . Having a recent backup handy can often save hours of work .

·       Against the system , which can suddenly break due to hardware or software problems . Even hard disks tend to be unreliable after some years of continuous activity . A recent backup saves the user from redoing all the work of the previous months .

·       Against viruses and other user , which can delete and alter files: a backup can save a user coming back from vacations .
                                                                                     
                                                                 Thank you