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

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?

from Android Forums at AndroidCentral.com - Ask a Question //forums.androidcentral.com/showthread.php?t=773626&goto=newpost
via IFTTT