Sony MHC-V42D Help Manual page 139

Help Guide
Home Audio System
MHC-V42D
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 file. If this does not fix the problem, the USB device may be broken. Refer to the operating
instructions of the USB device on how to deal with this problem.
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