Songs/videos cannot be played, or photos cannot be displayed.

The battery charge is depleted.

• Charge the battery fully. [Details]

• If your “WALKMAN” still does not react, even after charging the battery, press the RESET button to reset your “WALKMAN.” [Details]

Songs, videos, or photos transferred by drag-and-drop are not in the appropriate data hierarchy levels.

• Place the data in the appropriate folders and data hierarchy levels. [Details]

Transferred files are not in a format that can be played on your “WALKMAN.”

• For information on the playable files, see “Supported formats” [Details] Some files may not be played back, depending on their file specifications.

You transferred MP4 audio files to the [Video] folder by drag-and-drop.

• Drag and drop MP4 files to the [Music] folder on your “WALKMAN” when transferring them.

Formatting your “WALKMAN” failed to complete, or you formatted your “WALKMAN” on the computer.

• Retry formatting your “WALKMAN.” [Details]

If the problem still persists after performing the remedies above, press the RESET button to reset your “WALKMAN.” [Details]