- What are the brand / model of the USB drives you used?
- What is the format of those USB drives? And if you formatted them on your Mac, did you ensure the partition map was set to Master Boot Record?
- If you have tried with multiple USB devices, have you tried re-formatting your USB drive and giving it a different, unique name then tried again?
- What is the filetype of the track not showing the waveform?
- Does it not show the large waveform for ANY song or just some songs?
- How long are the songs where the waveform isn't showing?