Some songs in MP3 format are low-level compression and are not supported by the hardware.

The full name of MP3 should be MPEG1 Layer-3 audio file. The audio file is the sound part of the MPEG1 standard, also called the MPEG audio layer. It is divided into three layers according to the compression quality and encoding complexity, namely Layer. -1, Layer2, and Layer3 respectively correspond to the three sound files of MP1, MP2, and MP3, and use different levels of encoding according to different uses.

It is best to use Format Factory software first to convert (no matter what format) into a 3-layer compressed MP3 format,

and then put it on the USB flash drive. Can be played smoothly!