I just successfully used a 128GB card but had to download a utility to format it to FAT32. Windows 10 tools only format to exFAT or NTSF which the x930bt may not read. FAT32 utility is at https://www.grdian.com/resources/how-to-format-exfat-to-fat32
RonS, Thank you so much! My customer has had this vehicle 4 or 5 years and no audio. Your script worked like a charm and now he thinks I'm a hero! Kudos. AVIC-X930BT