I have an 8GB USB drive with just over 1,100 songs on it. After several attempts adjusting the MP3 tags (adding random numbers to the song title, adding random numbers to the artist, etc.) nothing worked. Tried putting songs in various folders which didn't have any effect. When the vehicle is turned off and back on, it will not remember the random mode setting. Only after removing all the MP3 tags and it will play songs in random order. Another thing I noticed is that songs play that have never or rarely played before in random mode after removing the MP3 tags.
The songs are on the flash drive as artist name - song name.mp3. One downside I noticed is it only displays xx number of charters of the file name on the screen. It's not smart enough to display the whole rest of the file name on the next line. Without any tags, Grace Note doesn't display any album art. Don't really need the album art because I know what songs are on the USB drive
The other downside is the I cannot request a specific song or artist by using the voice recognition system.