I want to keep the files on my thumb drive in sync with my Mac. This way, if I loose the thumb drive, I'll know exactly what was on it. Sure, all the files are on my machine anyway, but for day to day file swapping stuff, not everything ends up back where it belongs. And I'd have to hunt and peck to find all my "on the go" files, etc, etc. You know, stuff I like to keep handy. It would be nice to know every time I popped my thumb drive in, everything was copied to a directory as a backup. I know if I lost the thumb drive they'll be that one file that never made it back to my mac, or I won't notice it's gone until I need it. What app can I use to duplicate the thumb drive automatically to a directly upon mounting?