CD-2u: Audio files copied from a computer cannot be played back.

If audio files copied from your computer to an SD card cannot be played on the CD-2u, please check the following points:

• Type and capacity of SD card
  The CD-2u does not support mini SD cards, micro SD cards, or SDXC cards. Please use an SD card that conforms to the SD/SDHC standard with a capacity of 16 GB or less.
• SD card format
  SD cards not formatted by the CD-2u may not work correctly. Be sure to format the SD card using the CD-2u itself. For formatting instructions, see the “Formatting an SD Memory Card” section in the CD-2u Owner’s Manual.
• Audio file format
  The CD-2u can play only WAV audio files (44.1 kHz, 16-bit). WAV files in other formats and MP3 files cannot be played.