Maybe paint some pretty colors on it so it's not so bland!
You might take the SD card and reinsert it or if you have an SD card reader, try viewing it on your PC or laptop...
All of a sudden my phone says Blank SD card, it is in the top bar when you tap on it is says I need to format card, I tried that and now it says the same thing, do I have a bad SD card?? was working for many months
My phone did that too, I had taken out the SD card and put it in my PC to quickly delete stuff, popped it back in the Razr, and NOTHING! I freaked out as I had some important stuff on there, put it back in my PC, files where there, made a quick back up, installed it back in my phone, waited a few minutes and all was well. Another strange glitch I experienced.
If all is lost, the computer will not recognize your card and obviously your Android doesn't accept it either. Go ahead and wash it, clean, and dry it completely (maybe there is a connection issue.) Insert it in the card reader or adapter and plug it into the computer. If it shows up great, if not go into Device Manager and look around in the Disk Drive, or see if there are any error messages. I usually use "fdisk" or "Computer Management" (depending on what Windows version using) and format the card to FAT32.