Topic: 3DS SD card keeps corrupting itself!

Hello i am Dylan last week i went on my 3ds and played some super smash bros and nothing happened a few days latter i was playing super smash bros when i went to home screen to see all my games were gone so i went to data management then 3ds and it said it was corrupted so i rest the next day after reinstalling everything i was playing then i turned off my 3ds and booted it back up and everything was gone again WHY! So i tryed a different SD card cause it kept on happening and same thing PLEASE HELP.