Backup provides a feature of taking a backup of files which are opened by a user or system. This feature is referred to as volume shadow copy. Volume shadow copy creates a duplicate copy of all documents at the beginning of the backup procedure. This way, files which have changed during the backup process are copied properly. Due to this feature, software can keep on writing data to the volume during a copy operation, and copies can be scheduled at any time without locking out users.
As soon as an administrator selects to use the usual backup, all selected files and folders are backed up and the archive attribute of all documents are cleared. A standard backup does not use the archive attribute to determine which files to back up. A standard backup is utilized as the initial step of any backup plan. It's used with the combination of additional backup types for planning a backup strategy of an organization. Normal backups are the most time-consuming and therefore are resource hungry. Restoration from a normal backup is significantly more efficient than other kinds of backups.
An incremental backup backs up files which are changed or created since the last normal or incremental backup. It requires the backup of documents of which the archive attribute is set. After choosing a backup, it clears the archive attribute of files. An incremental backup is the fastest backup process. Restoring data from an incremental backup demands the last normal backup and all subsequent incremental backups. Incremental backups must be restored in precisely the same sequence as they were created.
Differential backup backs up files that are changed or created since the last normal backup. It does not clear the archive attribute of files after taking a backup. The recovery of files in the differential backup is more efficient than an incremental backup.