how to format the card

Formatting the Card
Step 1

Click “Start,” right-click “Computer” and select “Manage.”
Step 2

Click “Disk Management” from the Storage list on the left pane.
Step 3

Right-click your MicroSD card and select “Format.” The card may not be labeled, but you can identify it from the same drive letter used in Windows Explorer.
Step 4

Click “OK” to keep default values. Click “Yes” in the confirmation dialog to format your card.