Hi, Let me try explain the scenario: Recently I bought the SSD OCZ Agility 3 120GB, to replace the original HItach 320GB 5400. This hard drive is only to S.O, I bought to on e-bay a adapter to replace superdriver to second Hard Drive(http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=230602670945&ssPageName=STRK:MEWNX:IT), I'm from Brazil and its will come here in 2 months.. Mean while for I can install the OCZ, I did think in buy a TOSHIBA CAVIO 1tb 5400 External equal this: http://www.newegg.com/Product/Product.aspx?Item=N82E16822149191 And use it while my adapter of opitbay not come in brazil. The ideia is disassembly the Toshiba Canvio and put it on optibay adapter but I not have sure if the size of HD of Canvio is compatible with the macbook, is it possible: Open the Toshiba Cambio, take out the HD 2.5 and install it on macbook pro? thanks in advance.