my flash drive does not show up
I've plugged in my PNY 32GB Metal Flash Drive/attache and it is no where to be found. It is also not showing up in my disk utility, or another Mac that I've tried. I'm operating on the most up-to-date system for Yosemite. The disk drive says that it is mac compatible. Please help!
MacBook Pro (17-inch Early 2011)