I am giving the negative review on the samsung micro sd card.my personal experience its product also.i am online shopping for this product .but I am not satisfied this product .i had purchase 16 gb sd card rs. 350 .some days good but 1 month after not good . slowly slowlt come the virus after not show my mobile .totally waste of money for this product.my mobile be hang.so remove the sd card from mobile.its product quality not good.service also very bad.