I've read through many android forums and cannot seem to find the solution to this odd problem I came across today. I was in my photography class, taking pictures and making sure that they save to my SD card (32 gigs). I managed to take a few and when I had my camera app back up I noticed a black screen on the bottom left for my photo gallery letting me know that my pictures were not there due to my SD card suddenly not being read. I navigate quickly over to Settings>Storage>SD card and I notice that it says Mount SD Card - Insert SD card and it is greyed out and I cannot click on it. I immediately shut off my phone and removed the SD card and put it back in and rebooted the phone. I didn't see anything saying preparing SD card upon reboot, so I went back into Settings>Storage>SD Card to see if it had mounted. No it still said 'Mount SD Card - Insert SD Card.' At home now, I try to plug my usb cable into the computer and see if I can access my SD card to recover my files using usb mass storage. All I can see is my phones internal storage and not the external sd card. Now this sucks because just a month or two ago I had my 16gb SD card fry on me also and it had an error saying 'Blank SD card - Unrecognized file system.' I still have this 16gb card and I inserted it into my phone and it recognized it. (even though it is fried and blank) It still gives me to option to read it and mount it, but i couldn't because it was fried. So again, I insert my current 32gb san disk sd card and again, nothing is being recognized, I'm not even getting any errors regarding my SD card that would tell me to format or anything. It just doesn't read/mount and doesn't say anything regarding that. It just won't mount/read what should I do. This really sucks too because I have to have these pictures in by Friday, and I can't even get to them on my SD card because it won't mount, and without these pictures, I am going to fail my Photography exam. That would suck to fail my class due to my sd card randomly doing this. So, please if anybody has any information on what I should try and do please your assistance would be much appreciated.