Off-line Backup is basically designed for notebook users who are off-line most of the time,
and cannot rely on backup schedule to backup regularly. The backup interval allows notebook
users to specify the interval that they would like their data to backup. If this interval has
elapsed, backup will run automatically once this machine is online.
Logout Backup Reminder asks user if they would like to backup if they logout of the
computer or shutdown their computer.
Local Backup allows an extra copy of backup file to be kept on local hard disk when backup