Hi: I have an ocz vertex 2 120gb with the Mac OS installed as primary drive. I download lots of things like movies and musics and have the download folder in the SSD. Then i organizer my collections and move the downloaded files to a second hard drive (Scorpio Black 500gb) in the optibay. Should i move the download folder to the HDD? I unmount the second hard drive most of the time because i dont need it. Should i be worried with performance degradation?