Cause 1) The user is not authorized to use the back up or the password is incorrect.

Solution 1) Please log in as a user with the permission of the back up. 



Cause 2) There is no data in the backup range.

Solution 2) Please set the backup range.

Please check the settings of the time list.



Cause 3) The USB is not plugged in.

Solution 3) Please plug in USB. 

* Please lock switch off of USB memory.