To keep your microSD card in good condition, reformat it on a regular basis. Reformatting erases all of your content, so be sure to offload your photos and videos first.
To reformat your card, please turn on the camera and long-press the shutter button to enter the Camera Setting, then press the mode button several times to enter the system settings, then press the down button several times to Format the Card.
You can also tap the settings icons to enter the settings and scroll the screen to find Format Card.