Sorry Chenxintao
I have added a usb drive to my RPi by plugging directly into the RPi but really want to add another USB HDD connected directly to the HG659. This is so I can share it with other devices.
I have tried your IP address and it did not work. The mount point is something related to Linux and is needed to enable the mounting of the drive in Picoreplayer.
I enabled ftp and checked the file path for the USB and it is
ftp://mediarouter.home/Western_Digital-10583432_usb1_1/My Music/
I have added a usb drive to my RPi but I also want to add another USB HDD connected to the HG659. This is where I have problems.