"USB FULL" is displayed and memory cue registration is not possible even though there is free space on the USB memory device or USB hard disk.

A minimum of 6 MB of free space is required on the USB memory device or USB hard disk. If there is more than 6 MB of free space, the problem may be as follows:

Does the USB memory device have a protection switch (a write-protect switch)? If this switch is on, data cannot be stored in the memory, so "USB FULL" may be displayed.

Use the USB memory device with the protection switch turned off.