thanks for your helping with my problem .
i'll buy wd blue 500gb at next month for os and game data.
thanks and best regards to you.
@aandril, a400 in my country is 100 usd, too =)), include kingmax SMV32, crucial,samsung,wd,kingston,kingmax are the same price. so i dont have a reason to buy kingston or kingmax, cause in my country, they are bad product. In my country, we're only buy wd,samsung, or crucial