I bought a hex buffer for the i/o pins and use a 3.3v regulator on the 5v out pin and plug the regulated 3.3v into the the VDD of the sd card this way you will not have to desolder any parts and you don't have to run your arudino at half speed.
I bought a hex buffer for the i/o pins and use a 3.3v regulator on the 5v out pin and plug the regulated 3.3v into the the VDD of the sd card this way you will not have to desolder any parts and you don't have to run your arudino at half speed.