Why won’t my MicroSD card format?
If you run into problems with your MicroSD card, the first step towards rectifying the issue is usually to try and format the card. Sometimes, however, you may be unable to format the card using your laptop.
Some common causes of this frustrating problem are: The SD card is write-protected, which means Windows cannot make any alterations; The card is corrupted with a virus, and Windows does not work on corrupted cards.