How to fix Memory Card formatting problem ?

The solution of this problem is to format the Memory Card again with FATfile system through computer because your mobile cant read it any more so you cannot format it from your Mobile.

To format your Memory Card with FAT (FAT16) file system :

• Plug-in your Memory Card into your computer.

• Wait till computer detects the Memory Card.

• Now note down the Drive Letter of your Memory Card

Note: In this tutorial we will assume that drive letter of your Memory Card is I: but you should replace it with actual drive letter of your memory card.

• Now run Command Prompt by Typing CMD and hitting Enter in Start>>Run or by typing CMD and hitting Enter key after pressing WinKEY+R.Windows 7 and Vista users should type CMD in Start’s Search Box when Command Prompt appear, right click on it and run as administrator.

• Once Command Prompt launches, Type I: /fs:FAT and hit enter.

Please note that in above tutorial we assumed that I: is drive letter of memory card but this could not be same in your case so make sure to replace I: with actual drive letter of your Memory Card.
Also Please note that if you format anything your data will be erased.