MILPITAS, Calif.--(BUSINESS WIRE)--SanDisk Corporation (NASDAQ: SNDK), a global leader in flash storage solutions, today announced that its Board of Directors has authorized an additional $2.5 billion for common stock repurchases under the company’s existing stock repurchase program. The company began its capital return program in the fourth quarter of fiscal 2011, and since that time the Board of Directors has authorized a total of $6.25 billion for stock repurchases including the additional a