How come i cant used a new micro sd card in my phone but i old one works fine

[AC Question]

I'm using a 8gb micro SD card and I got a new one that's 16gb micro SD card and it won't work in my phone it says blank card or unsupported files what do I do to make it work in my phone?

 

[belodion]

Does your phone accept a 16gb card? If so, is the card of reputable make?