Problem with NDX with Usb

Hi All,

i have an NDX which I am currently using to listen from flac files through a flash disc (64gb) connected to the front panel USb input. while listening to music the playback suddenly stops without any apparent reason. Also on occasions when I try torestart the song after this happens, the NDX freezes alltogether, unable to play any kind of source.

does anyone experience a similar issue? What is the reason, may the culprit be my flash drive?

Thanks