SanDisk Ultra Micro SD Slow

I recently purchased a micro SD hc ultra card 16 gb… What I did then after a month was defragmenting of the card… Then when I had set up my phone it started to lag the speeds were slower … So I decided to format it I did it in fat32 … But the card is still slow … What should I do… Plzzz HELP!!!

I don’t know if it has anything to do with your speed issue, but you should NEVER de-frag a flash memory card or system.