How+to+Delete+Photos+from+the+Camera

To delete all photos on the camera, select MENU, scroll down to Delete, and follow prompts to delete all photos.

To delete single pictures, press the Trash Can button on the back of the camera while the photo appears in the window.

For more information, go to page 26 of the User's Manual: http://www.nikonusa.com/pdf/manuals/noprint/S550_ennoprint.pdf