OK... I am thinking the deal is that my USB flash drive is not 'mounting'. When I insert it, there is no "Media Mounting" message or "*****" displaying that indicates the DP even recognizes the USB. Any thoughts? BTW, the USB did format from the DP so it must have 'seen it'. I deleted all data, reformatted, confirmed it is FAT32, and reloaded all the data again. The manual states I should see appropriate messages (see above) when inserting the USB. I don't. Any help there? Stupid electronics! This is why I play bluegrass mandolin and guitar. No electronics required, lol.