HELP I CANT SAVE MY FILE!! ITS DUE TOMORROW!!

OKAY IM IN THIS DIGITAL DESIGN CLASS AND WE HAVE AN ASSIGNMENT DUE TOMMORROW AND I CANNOT SAVE MY PHOTO, SCREENSHOTTING RUINS THE QUALITY AND IT WILL GET DOCKED POINTS!!

WHENEVER I TRY TO SAVE, I GET PROMPTED WITH THE "Could not complete Save As command due to disk error (-1"

HOW DO I FIX THIS?? THERES NOTHING ON MY HARD DRIVE