Multiple versions of files are useful when users continually update files and sometimes need to restore the original file from which they started. The most current backup version of a file is called the active version. All other versions are called inactive versions. Each backup program has its own approach to executing the backup, but there are four common backup types implemented and generally used in most of these programs: full backup, differential backup, incremental backup, and mirror backup.There are mainly three types of backup are there: Full backup, differential backup, and incremental backup. The most common backup types are full backup, incremental backup, and differential backup. Other backup types include synthetic full backups and mirroring. In the debate over cloud vs. local backup, there are some types of backup that are better in certain locations. Experts recommend the 3-2-1 rule for backup: three copies of your data, two local (on different devices), and one off-site. For most people, this means the original data on your computer, a backup on an external hard drive, and another on a cloud backup service. There are three main types of data backup – full backup, incremental backup, and differential backup. These can be performed as cloud backup or on-premises backup. Cloud backup is by far the most important type of backup a business can perform. Complete restore without control files SnapManager restores all tablespaces and data files, without the control files.