Mazda 2008 Mazda3 4-Door Owner's Manual page 201

If a disc has both music data (CD-DA)
l
and MP3 files, playback of the two file
types differs depending on how the
disc was recorded.
Packet written discs cannot be played
l
on this unit.
This unit does not play CDs recorded
l
using MP3i (MP3 interactive), MP3
PRO and RIFF MP3 formats.
About folders and files
The order of hierarchy for MP3 files
l
and folders during playback or other
functions is from shallow to deep. The
arrangement and playing order of a
recorded disc containing MP3 files is
as follows:
File number
l
A numerical file number is assigned
to each file in a folder in the order of
hierarchy from shallow to deep.
Folder number
l
A numerical folder number is
assigned to each folder in the order
of hierarchy from shallow to deep.
Folder
No.
3
2
4
5
1
Level1 Level2 Level3 Level4
The folder order is automatically
l
assigned and this order cannot be
optionally set.
Any folder without an MP3 file will be
l
ignored. (It will be skipped and the
folder number will not be displayed.)
Interior Comfort
Audio System
6-23