From What I've heard. Western Digital has 2 types of WD3200AAKS. The old with 2 platters, and the new with 1 platter. Although this will make no difference to most people. Others may buy this thinking that it is the single platter version. WD have refused to exchange older versions for newer versions when people make this mistake. I would just like to check with you guys if you know which version you have. Or if you have a mix supply of old and new.