I'm owner of RT-N13U Rev B1, I also have problems with the USB storage, it worked once long time ago then can no longer work, then I gave up! Well after reading your issue, I've upgraded to firmware 2.0.1.1, now I cannot even set up using the "Aidisk"! It states that "You have not plugged any USB disk or have removed it. Please plug it and use the wizard again." What firmware you are using and what is your current issue, maybe when I got time I can try something.