MP3 files from USB flash drive - Occasional popping and clicking

Does anyone get occasional popping and clicking when listening to MP3s from a flash drive? I've tried different flash drives, and have had the same issues. It's only occasionally, and I can't seem to figure out what makes it start or stop. I can skip to the next track, or next folder, same issue. And then sometimes (usually) it's fine. Doesn't seem to matter if it's constant or VBR, or if they were purchased from Amazon or ripped from my own CDs.

Faulty radio or USB port? My Corolla has the same or worse problem, the USB would load then play a few and crash. It also gives off weird loading sounds that i don't hear in my mirage. Best thing you can do is buy a new player.