Hello friend, Your memory card got corrupted,? I am here with a solution for the MMC error. There is no harm to have a try. This solution may or may not mend your memory card. For this treatment your computer have to detect your memory card but sometimes mmc is even not detected by the PC,in this case its severe Problem.
Just open the below link it is my blog I have explained what to do and how to do..and it is very easy to read..not so complex