Verify that the backup device is online. Select Settings > Storage and Retention > Backup Devices and open the device you wish to use. Make sure the online box is checked for the device.
Make sure tasker is running. Go to Settings > System Monitoring > Jobs and check the Advanced Options checkbox to see the Start tasker at the bottom of the screen, if present.
If a calendar is in use in a schedule that has no selective backups associated with it, attempts to modify the calendar to add a selective backup will fail. This is expected behavior, since an inclusion list is required for selective backups and none are currently assigned in the schedule. Follow these instructions to add a selective backup to an existing schedule:
1 Make a copy of the calendar that will be modified.
2 Edit the copied calendar and add one or more selective backups on the desired dates.
For each schedule using the calendar, perform the following:
3 Select the schedule and click View/Modify.
4 Change the calendar assignment to reflect the new calendar.
5 Assign inclusion lists to all clients selected in the schedule.
6 Save the schedule.