Hi guys, I am thinking of adding higher speed external port for my old Macbook Pro 17" mid-2009 (MacbookPro 5,2). Which one will you recommend the most, Expresscard 3/4 USB 3.0? Or Expresscard eSATA? I knew that USB 3.0 is theoritically transferring data at a higher bit rate, but I am not too sure if the Expresscard 34 slot will be able to achieve USB 3.0's speed. Please help me! Thanks alot!