Clicking on the More options in the last step of the New Backup Task wizard opens up a pop-up with the settings. If no changes were made to the settings, they will retain their respective default values for your current backup task. Note that if later on you change certain settings and save them as default, it will not affect the tasks created with the default settings (they will retain the settings which were default at the moment of the task creation).
Clicking the Save button applies the settings changes to the newly created backup tasks only. Clicking Apply to all tasks makes the new backup settings applied to all existing backup tasks. E.g. you need to change the E-mail address for E-mail notification on all your tasks. With Apply to all tasks it can be done at once. Just confirm the operation by clicking Yes when the pop-up warning appears: “All existing backup tasks will be modified in accordance with the specified default settings. Do you want to continue?”
Apply to all tasks saves the settings only for the one selected tab on the left side (except the Archive protection). This section below describes those settings one by one.