Galaxy S4: How do I Format the microSD™ card?
Format microSD™ Card
To format the microSD card on your mobile device, from the Home screen, touch Menu > Settings > More > Storage .
Your microSD card information is shown on this screen, along with your device memory. Touch Format SD card. Review the message about data, and touch Format SD card again. Touch Delete all to complete the formatting process.
WARNING: Formatting your microSD card will remove all personal information from the card. This information cannot be recovered.
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