How to Clean the Disk on a SD Card
By Mario Calhoun
Your Secure Digital (SD) card is a portable storage device that holds up to 8GB of information, and can be used on any device that has a SD card reader. Whether you wish to add new information to the SD or simply clear it completely for reselling purposes, it is important to delete all information from the SD card to protect your private information by formatting the disk. Once the card has been cleared, store your SD card in a protective case to prevent physical damage.
Format on a Windows computer
Insert the SD card into the card reader or SD card slot on your computer, with the label facing up.
Double-click the "My Computer" icon on your PC's desktop, and right-click the "Removable Disk" icon.
Select "Format" from the pop-up menu, and select "FAT" for SD cards with 2 GB of space, or "FAT32" for SD cards that have 4 GB or more.
Click the "Start" button to begin the formatting procedure.
Format an SD card on a Macintosh computer
Plug the SD card reader into your computer's USB port, and insert the SD card with the label facing up.
Click the "Finder" icon on your screen's dock, and click the Applications folder.
Double-click the "Utilities" folder, and double-click the "Disk Utility" icon.
Click the name of your SD card in the Disk Utility's sidebar, and click the "Erase" tab.
Click the drop-down menu next to "Format" and select "MS-DOS." Click the "Erase" button to begin the process.