Following the advice from this forum, I used Setup Assistant to transfer all the files and setups from my old MBP to a new one. But I then noticed that my new MBP also has the same problems I faced when I was still using my old one. One of the problems is that it takes a significantly long time (sometimes up to 30 seconds) for an external HD or USB flash disk to mount. So I've been wondering if the problem exists because I somehow duplicate the troublesome setup or file from my old MBP. Please advice. Thanks.