Backup Modes

Backup modes differ by how the state of the Archive bit affects the backup.

Windows always sets the Archive file attribute for a file that is likely changed (created, modified, copied, etc.).

There are three general Backup Modes:

Full - back up all the included files whether the Archive bit is set or not; clear the Archive bit of the files that have been backed up.

Incremental - back up only those included files that have the Archive bit set; clear the Archive bit of the files that have been backed up.

Differential - back up only those included files that have the Archive bit set; do not clear the Archive bit of the files that have been backed up.

One additional mode (Default) you set yourself by switching the Archive Bit Logic options at the General Properties page. This mode is used when you press the Backup button of the main window, or create a backup from a shortcut.

Each of the modes can be activated from the Backup menu, the command line or the scheduler.

Both the Incremental and the Differential modes back up only changed files. However, there are some differences that originate from their definition above:

(1) The Incremental mode backs up a file if it has been changed since it was backed up last time. The Differential mode backs up files changed since the last Full backup.

(2) When you're using "Full+ Incremental" approach, any changed file presents in one incremental backup. When you're using "Full+ Differential" approach, , any changed file presents in each differential backup.

(3) When you're using "Full+ Differential" approach, you restore your data by restoring the last full backup, and the last differential backup. When you're using "Full+ Incremental" approach, you restore your data by restoring the last full backup, and all the following incremental backups.

See the Which Backup Modes to use topic for our suggestions on using the Backup Modes.