Hey Blair, we've tried a couple of options, however still not recognizing the USB drive. We've tried all songs in root directory, organizing in folders, and using a 16Gb drive vs. 64Gb. It could be that the Verbatim drive is too wide and won't seat all the way in? I've taken a USB extension cord and shaved down the sides and see if that will work. Try to do it this evening. Thanks again for the suggestions, K&S