Some time in the middle of the day my SD card stopped functioning properly. I have the stock 16gb card and between my lunch hour and the end of the day it started saying the sd card was blank or not a recognized format. Frustrated but giving in I attempted to just reformat the card to no avail, no process, series of windows, or anything occurred, and my sd was still "blank" when I went into the memory menu I noticed that my sd card was actually unmounted, however pressing the mount option did nothing as well. Any idea why this might be happening? or how I might be able to enjoy my phone fully again?