Transferring is stopped before it is finished.
•You are using an unsupported USB devices. See “Compatible USB devices with this system” (page 56) for the supported device types.
•The USB device is not formatted correctly. Refer to the USB device operating instructions for how to format.
•Turn off the system and remove the USB device. Then, turn on the system. If the USB device has a power switch, turn the USB device off and then on again after removing it from the system. Then perform transferring again.
•If the transferring and erase operations are repeated multiple times, the file structure within the USB device becomes complex. Refer to operating instructions of the USB device on how to remedy this problem.
Transferring to an USB device results in an error.
•You are using an unsupported USB device. See “Compatible USB devices with this system” (page 56) for the supported device types.
•The USB device was disconnected or the power was turned off during transferring. Delete the partially- transferred file, and transfer again. If this does not fix the problem, the USB device may be broken. Refer to operating instructions of the USB device on how to remedy this problem.
•Turn off the system and remove the USB device. If the USB device has a power switch, turn the USB device off and then on again after removing it from the system. Then perform transferring again.
Audio files or folders on the USB device cannot be erased.
•Check if the USB device is write- protected.
•The USB device was disconnected or the power was turned off during the erase operation. Delete the partially- erased track. If this does not fix the problem, the USB device may be broken. Refer to operating instructions of the USB device on how to remedy this problem.
Are you using a supported USB device?
•If you connect an unsupported USB device, the following problems may occur. See “Compatible USB devices with this system” (page 56) for the supported device types.
–The USB device is not recognized.
–File or folder names are not displayed on this system.
–Playback is not possible.
–The sound skips.
–There is noise.
–A distorted sound is output.
–Transferring stops before it is finished.
“Over Current” appears in the display.
•A problem has been detected with the
level of electrical current from the 
(USB) port. Turn off the system and
remove the USB device from the 
(USB) port. Make sure there is no problem with the USB device. If this display pattern persists, contact your nearest Sony dealer.
There is no sound.
•The USB device is not connected correctly. Turn off the system, then connect the USB device again and check if “USB MEMORY” lights up in the display.
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Information Additional