There are can be different reasons that might trigger this problem for individuals. Here are the most common causes that don't let you format your SD card: In a general scenario, you are most probably to face this issue if you have the write protection enabled on your SD card. So, make sure the write protection is turned off on your SD card to be able to successfully format your SD card. It is also possible that there are bad sectors on your SD card that are not letting the SD card to format. If the scenario is applicable, repartitioning the SD card should help you fix the problem.