rootdir/etc/mountd.conf

## mountd configuration file

## add a mount entry for each mount point to be managed by mountd
mount {
    ## root block device with partition map or raw FAT file system
    block_device    /dev/block/mmcblk0
        
    ## mount point for block device
    mount_point     /sdcard
    
    ## true if this mount point can be shared via USB mass storage
    enable_ums      true
    
    ## path to the UMS driver file for specifying the block device path  
    ## use this for the mass_storage function driver
    driver_store_path   /sys/devices/platform/usb_mass_storage/lun0/file
    ## use this for android_usb composite gadget driver
    ##driver_store_path   /sys/devices/platform/msm_hsusb/gadget/lun0/file
}