What should be considered when playing audio from USB source?

AW: Format the USB data medium you want to use with FAT32 – before use. Zenec generally recommends to use only high quality USB sticks. Please note the specifications in the device main features for the allowable memory sizes. Also note that the USB ports on the device are designed for a current consumption of max. 1500 mA. Since external hard drives often require higher operating currents, we do recommend use. Further information about USB and MP3 playback problems can be found here: