Files are not registered in the history.

This may be for one of the following three reasons:

1. Files cannot be registered in the history if there is not enough free space on the USB memory device or USB hard disk.
2. Files can only be registered in the history if they have been transferred to the USB memory device using rekordbox.
3. Files cannot be registered in the history if they have been selected for less than 60 seconds. This unit is designed to register files in the history when they have been selected for more than 60 seconds. Files are registered in the history if they have been selected for more than 60 seconds, even if an operation other than playback (pause, etc.) is performed.