Does Volvo not have a built-in hard drive? You can only use that USB interface to plug in a USB flash drive to play music, right? (Of course, except using carplay to connect to a mobile phone for playback) Is there a way to divide songs into different folders and subdirectories for U disk playback? It's like different albums, otherwise it would be too troublesome to find many songs! Thanks for the guidance, gods! Does Volvo not have a built-in hard drive? You can only use that USB interface to plug in a USB flash drive to play music, right? (Of course, except using carplay to connect to a mobile phone for playback) Is there a way to divide songs into different folders and subdirectories for U disk playback? It's like different albums, otherwise it would be too troublesome to find many songs! Thanks for the guidance, gods! The premium version is at the back. Correct steps: 1. Open your favorite player, drag in the USB music file, save the playlist in m3u or m3u8 format 2. Use a text editor such as Notepad, open the playlist file, and replace the USB directory, for example, the list is :D: xxx.wav, F: 132xxxxx.wav, replace with xxx.wav, 132xxx.wav, just edit the absolute path to a relative path, save it as m3u8 format, and select unicode3.Done for encoding! ! I don’t know if it’s been flashed. For details, you can search "About XC90 playing U disk file playlist advanced version: format with directory". The poster can consult with your moderators. If you are satisfied, please accept it. Thank you. You can try that gadget @2019