What is backup and recovery?

Backup is a copy of data and acts as safeguard against any unexpected data loss and application errors. Backing up data requires copying and archiving computer data, so that it is accessible in case of data deletion or corruption. Data from an earlier time may only be recovered if it has been backed up. Today, a great deal of data can be backed up when using cloud storage, which means archiving on a local system's hard drive or using external storage is not necessary.