Designed for My Passport Essential??(model WDBACYxxx， WDBAAAxxx)， My Passport for Mac??(model WDBAABxxx)， My Passport Essential SE (model WDBACXxxx， WDBABMxxx)， My Passport SE for Mac (WDBABWxxx)， and My Passport Elite??(model WDAACxxx) portable drives. <br> NOTE:? This case is not compatible with My Passport Studio? portable drives