Car navigation can only read audio in MP3 format. Your lossless music is either APE or FLAC, which he can't read.
Lossless music has a high sound quality and requires a high player. That is to say, only players that support lossless music can play it. Suggest downloading ordinary MP3 music directly! ?
there is lossless music, although the sound quality is good, but in general, it is difficult to tell the difference.
Extended information
How to play lossless music
1. FLAC is a lossless audio compression format, which can be played with foobar2 and winamp, because both of them have FLAC decompression plug-ins. If your player can't play, it is recommended to download the plug-in and install it at the following address (this is winamp's FLAC playback plug-in);
2. using JetAudio, the interface is simple and practical, which directly supports playing FLAC files.
Baidu Encyclopedia: How to Play Lossless Music