2010 Chevrolet Avalanche Owner's Manual - Page 306

Compressed Audio or Mixed Mode Discs The radio can play discs that contain both uncompressed CD audio and MP3 files. If both formats are on the disc, the radio reads all MP3 files first, then the uncompressed CD audio files. USB Supported File and Folder Structure The radio supports: ... Up to 700 folders. Up to 8 folders in depth. Up to 65,535 files. Folder and file names up to 64 bytes. Files with an .mp3 or .wma file extension. AAC files stored on an iPod. FAT16 FAT32 CD‐R or CD‐RW Supported File and Folder Structure The radio supports: ... Up to 50 folders. Up to 8 folders in depth. Up to 50 playlists. Up to 255 files. Playlists with an .m3u or .wpl extension. Files with an .mp3, .wma, or .cda file extension. Root Directory The root directory is treated as a folder. Files are stored in the root directory when the disc or storage device does not contain folders. Files accessed from the root directory of a CD display as F1 ROOT. 4-98