SD cards are used to store and transfer computer files of all kinds. Data can be added and deleted as often as necessary, but it is common to come across a problem when you try to delete data or format the entire card. SD cards can be write-protected, which means data is not allowed to be removed from the card. While this may sound like a big problem, it is simple to fix.
Hold the SD card so the label is upright and facing you. Locate the switch on the left side and slide it up to unlock it. If you have a Micro SD card, put it into an SD card adaptor. Slide up the switch on the adaptor to unlock it.
Insert the SD card into your computer. If you do not have a built-in SD slot on your computer, then connect it with a USB adaptor.
Open the Computer icon on the desktop. A window will open with a list of the available drives. Locate the drive the represents the SD card. The name of the drive may differ depending on you named it, or what the default name is.
Right-click on the drive and select Format. If it asks what you would like to format it to, select "FAT32" and click Start.
Wait for the format process to finish before you remove the SD card.