Please let me know the firmware version on your uTrack24
What did you do with the encoder wheel during recording? I would like to reproduce this problem.
The uTool not able to load the recording because the settings file missing and there’s a good chance the wav file header also damaged. We will include wav file repair function in the next uTool release.
If you connect the USB drive to your MAC what do you see inside of the song folder? How many file there? What is the name and size of those files?
What is your USB drive brand and type?