Formatting permanently erases all data on the memory card. If necessary, view this video for help transferring content to your computer.
Insert the memory card into the computer's internal memory card reader.
Alternatively, insert the memory card into an external memory card reader then ensure that is connected to the computer.
Launch Windows Explorer.
Using the computer keyboard, press Windows+E (+E) keys.
For Windows 7, right-click Start then click Explore or Open Windows Explorer.
For Windows 10, right-click Start then click File Explorer.
From Windows Explorer, locate then right-click the appropriate removable storage drive.
From the 'Format' screen, ensure that the following options are configured as desired:
Allocation unit size
Enabled when a check mark is present.
Quick format removes files from the memory card but it does not scan for bad sectors. The option should only be enabled when the memory card has been formatted previously and you are certain that the card is not damaged.
Depending on card capacity, Quick format may take between 15 seconds and 2 minutes to complete. If Quick format is not selected, the process takes longer (20 minutes for an 8 GB card).
Click Start (located at the bottom).
From the 'WARNING: Formatting will erase ALL data on this disk?' prompt, click OK to confirm.
If presented with the 'Format Complete' prompt, click OK.