Tracks are not registered in the HISTORY.

Only the tracks analyzed by using rekordbox are registered in HISTORY. If the analyzed tracks are not registered in HISTORY, following 4 cases are possible.

1. No sufficient space available on the USB device (such as flash memory or hard disk).
2. The USB device is write-protected.
3. The track is loaded for less than 60 seconds. (Once the track is loaded for more than 60 seconds, the track is registered in HISTORY. If track is paused for more than 60 seconds, or any action other than playback is performed on the track for more than 60 seconds, it is registered in HISTORY.)
4. The track is not registered in HISTORY when the track was loaded from the [Folder] and played.