A computer backup is a copy of electronic data stored separately from the original files. In the event that the original data set gets corrupted, damaged, deleted or lost, the backup can be used to recover or restore the data. A backup therefore minimizes the risk of irretrievably losing data. The concept of backing up information is much older than computers themselves. In the 1950s, the first backups of computer data were made onto punch cards, a simple technology that at the time was already over a hundred years old. In the 1960s, paper was replaced by magnetic tape. Due to its.
