2021 with the hk radio , I'm trying to convert my wav files to flac to save space on my 32 g 3.0 sd thumb drive.. its formated fat32 .. I can't seem to get them to play.. the radio will read the artist, song, etc but won't play the music.. it'll play the wav files just fine.. any ideas ? Will the hk radio support flac files? Thank in advance for any ideas..