Suppress "autoplay" when external USB drive connected
I was hoping to be able to programmatically suppress the default "My Files" system app from starting when a USB storage device is plugged in, but it looks like it is not possible.

However, I did find a workaround. First I installed a new file manager/explorer from the market (I used ES File Explorer). Then I went to Android Settings -> Applications and then selected the My Files app from the list and disabled it. Now it no longer interferes with my own application that I am developing for my USB storage device. Not the ideal solution, but it works for now.