Sony NW-HD5 Instruction & Operation Manual page 160

Connection with the computer/SonicStage (continued)
Audio data is
transferred back to
your computer and
remaining transferable
count increases
without operations
occasionally when the
player is connected to
the computer.
The operation of the
player becomes
unstable while it is
connected to the
computer.
"Failed to authenticate
Device/Media." is
displayed on the
computer screen when
the player is connected
to the computer.
 If a track is deleted from the player using the
SonicStage software installed on a computer
other than the one used for transfer to the player,
the track will be transferred back automatically
when the player is connected to the computer that
you used for transfer to the player. Therefore, the
remaining transferable count increases
automatically.
 A USB hub or USB extension cable is used.
Connecting via a USB hub or USB extension is
not guaranteed. Connect the USB cable directly
to the computer.
 The player is not connected to the computer
properly. Quit the SonicStage software and verify
the connection of the USB cable. Restart the
SonicStage software.
Continued 
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