Keeping your songs safe from employees copying files

[oncall]

OK, here's a dilemma??? I want to grow my business, let's say i want a second KJ out doing a show, I am concerned that handing a "hired" KJ my hard drive with over 10,000 songs (KMA files of course) might expose me to that person "stealing" "copying" my files. How can I protect myself from this happening. It was more difficult for someone to figure out how to copy 700 cd's in one night, but with HDD now, how do we protect ourselves. Is there a way to lock down my laptop or something so that nothing can be copied from it without a "code".

thanks