1) After you plug in the usb drive, wait a few seconds and type dmesg on the commandline in Knoppix. You'll see something mentioned about your drive, say for example that it is /dev/sda1. Use the mkdir and mount commands to access the files:
mkdir /mnt/usbdisk
mount /dev/sda1 /mnt/usbdisk
ls /mnt/usbdisk
etc.
2) looks like it's in Bridge mode in stead of Gateway/Router mode.