There is a lot of scattered info about this but I couldn't use any of it..

What's the proper way of mounting an USB stick at startup (with custom options) and then running a command from it?

I currently can do both those things manually. I tried writing the mount line into /etc/rc.local via the UI but it doesn't work. What's strange is that the USB is already mounted (but not like I want i.e. with -o sync) despite the fact that I didn't setup any mount points in the UI and /etc/config/fstab is vanilla.

Running Backfire 10.03.1 on a TP Link MR3420.

Thanks!