I bought a new Mecool KM2. I updated the device and went to browse the USB stick that's formatted with FAT32 and has some video files on it. The Mecool sees the device but when I click on it I only see the Misc and Available options. When I click on those options, nothing happens. I rebooted and got the same results.
I made sure that USB debugging is off, I installed ANT+ USB service, and restarted, but I get the same results.
Sounds like your not using a file manager app.