Lg g4 stylus h540…memory card probleme…urgent help

I have a lg g4 stylus h540 that when I insert a new memory card works fine for about 4 days then start to give breaked pictures and movies and files after a week or two the phone can’t more detect the same memory card when I take out a placed on another phone I find a result that the memory card is destroyed… So I need a new one…. Please I want to know why this is happening and how to fix that