A sad day for me and YouAmp! It wouldn't read music from my new 32GB flash drive!

Longer story:
1. A while ago, I got an ativa 4GB flash drive and an OTG USB cable. I plugged these into my N810. File manager recognized the USB drive &, when I pointed YouAmp to the flash drive (saved preferences, restarted YouAmp), YouAmp read music files from it.
2. Now, I've purchased a Kingston Patriot 32GB flash drive. I plugged it in using the same cable. File Manager recognizes it. MediaBox reads music from it. But when I point YouAmp to it, the next time I start YouAmp it updates for just a few seconds and then I'm looking at a blank music library. :-(

Perplexing. I would really prefer to use YouAmp b/c it's so much more straightforward than MediaBox. All MediaBox's bells & whistles will waste time for me and make my wife hate my N810 even more. But right now I'm stuck.