In Linux Mint 13 (MATE edition), when you insert a USB drive into your machine, a popup window will appear to show the files and folders you store within the USB. I dont like this feature, when I insert a USB into my machine, I just need it to be mounted and dont want to be distracted by any popup window.
To disable that popup window feature in Linux Mint 13 (MATE), you just need to open Caja file manager and go to the Preferences window:
After the Preferences window appear, go to the media tab and check the "Never prompt or start programs on media insertion" option:
From now, no annoying popup window will appear when you insert a USB drive into your machine. This trick also works in Ubuntu, Linux Mint Cinnamon and other distros that use Nautilus file manager.