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In Backup4all you can clear the backup job, which means to delete all backup versions from destination and also delete the backup catalog. That will result in a fresh job, starting that backup from the beginning.
To set the clear backup action, please open Backup Properties and go to "Advanced" page. In the "Run action before backup" section, you will find the "Run program or action" checkbox. Please select it and you will be able to access the action field.
The <Clear backup> predefined action deletes the ".bkc" file and all zip files associated with the current backup job. If this action is set, then the next backup performed will be a full backup, even if the backup type is set to incremental or differential.
Use the "Run only once" option in order to run the specified action only one time. If the option is not set, it will clean the backup on every execution.
The "Abort backup when action fails" option is used to abort the current backup execution if the action executed before the backup failed. It is most used in cases when the backup execution depends on the result of the action executed before backup. For example: in order not to fill the destination drive if the clear backup action failed, the backup will not be executed.
Please note the backup will wait until the action before backup is executed. Only after that, it will start the backup.
How to customize the clear backup
You can customize the "Clear backup" action with the following parameters (numbers can be changed as necessary):
<Clear backup d=7>
Clear backup is executed only if 7 days have passed since the first backup increment (the full backup).
<Clear backup n=10>
Clear backup is executed only if the number of file versions is 10.
<Clear backup d=7 n=10>
Clear backup is executed if 7 days have passed since the first backup increment (the full backup) or if the number of file versions is 10.
<Clear backup dw=1,2,7>
Clear backup is executed only in the first, second and seventh day of the week (Monday, Tuesday and Sunday in the given example). Valid values: 1-7 (if a parameter outside of these values is set, it will be ignored).
<Clear backup dm=23, 30>
Clear backup is executed only in the 23rd and 30th day of the month. Valid values: 1-31 (if a parameter outside of these values is set, it will be ignored, same as using the value 31 for a month having only 30 days).