Uniden BC6440D Owner's Manual page 51

Something wrong with the USB backup.
Possible reasons:
• There are not enough DVR resources available. Please stop recording and proceed with backup.
• The backup device is not compatible.
• The backup device is damaged.
• Not enough room on backup device.
Alarm is not working.
Possible reasons:
• The alarm setting is incorrect.
• The alarm input signal is incorrect.
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