How to Fix a Micro SD Card
The MicroSD flash memory format is a small version of the regular SD card that is used primarily in portable electronic devices such as MP3 players and cell phones. If you are having trouble with a MicroSD card, there are several easy fixes you can employ to solve common problems with the MicroSD format.
Remove the MicroSD card from the device you are trying to use it with and flip it on its backside. Look at the bronze connector pads. If these are dirty, they could be causing the SD card's malfunction. Dampen a cotton swab with alcohol and then gently rub it against these metal pads to clean them.
Insert the MicroSD card into its adapter (which was sold with the card) after making sure the write protection switch is in the "off" position. Then remove the MicroSD card.
Re-format your MicroSD card. If you are using the MicroSD card with a new device, it may need to be re-formatted. Put it back into the adapter and then place it in your computer's SD slot or external adapter. Then select the SD card icon in the "Computer" or "My Computer" section of your computer, right-click, and select "Format" from the sub menu. Then press "Next" from the pop-up menu to format the MicroSD card.