I am relatively new, and my web interface seems different than videos and screenshots I've seen, but this is how I changed it. BTW, I am using Firmware Version: 3.0.0
On the main page choose "Resources" Click on the "USB Info" tab In the "Fstab Configuration:" box, edit the portion you need and click "Update Fstab" Follow the rest of the directions and that should do it.
Hope it helps!