3865-6. Using an external device
HIGHLANDER_U
■USB memory functions
●Depending on the USB memory device that is connected to the sys tem, the
device  itself  may  not  be  operable  and  certain  functions  may  not   be  avail-
able.  If  the  device  is  inoperable  or  a  function  is  unavailable  due  to  a  mal-
function  (as  opposed  to  a  system  specification),  disconnecting  the  device
and reconnecting it may resolve the problem.
● If the USB memory device still does not begin operation after b eing discon-
nected and reconnected, format the memory.
■ Error messages for USB memory
■ USB memory
●Compatible devices
USB memory device that can be used for MP3, WMA and AAC playback.
● Compatible device formats
The following device format can be used:
• USB communication format: USB2.0 HS (480Mbps) and FS (12 Mbps)
• File system format: FAT16/32 (Windows)
• Correspondence class: Mass storage class 
MP3,  WMA  and AAC  files  written  to  a  device  with  any  format  othe r  than
those listed above may not play correctly, and their file names and folder
names may not be displayed correctly.
Items related to standards and limitations are as follows:
• Maximum directory hierarchy: 8 levels
• Maximum number of folders in a device: 3000 (including the roo t)
• Maximum number of files in a device: 9999
• Maximum number of files per folder: 255
● MP3, WMA and AAC files
MP3 (MPEG Audio LAYER 3) is a standard audio compression format. 
Files  can  be  compressed  to  approximately  1/10  of  their  original   size  using
MP3 compression.
WMA  (Windows  Media Audio)  is  a  Microsoft  audio  compression  format. This
format compresses audio data to a size smaller than that of the  MP3 format. 
AAC is short for Advanced Audio Coding and refers to an audio c ompression
technology standard used with MPEG2 and MPEG4.
MP3, WMA and AAC file and media/ formats compatibility are limited.
MessageCause/Correction procedures
“Connection  error.  Please
consult  your  Owner’s  Man-
ual  for  instructions  on  how
to connect the USB device.” 
This indicates a problem with the USB mem-
ory device or its connection.
No music files found.This  indicates  that  no  MP3/WMA/AAC  files
are included on the USB memory device.