In order to unlock your Micro SD card, open your phone, navigate to File Manager/File Explorer and select System Folders from Settings. Locate the mmcstore file and send it to your computer using the Bluetooth or an USB cable. After that, right-click the file, open it in Notepad and check the displayed password. If it doesn't work, you will need to format the SD card. Insert the card in a card reader and plug it in a USB port of your computer. After that, open Computer/My Computer and check the name of the card reader driver. Press Start, type cmd and open the utility using Administrator rights. Type format I: (where I is the name of your card reader drive) and hit the Enter key.
