5. Return or Destruction of Confidential Information. Upon written request from Discloser, Recipient shall return to Discloser or, at Recipient’s option and cost, destroy all Confidential Information (including copies thereof and extracts therefrom) of the Discloser; provided, however, that Recipient may retain a copy of such Confidential Information for archival purposes and subject to any copies remaining on Recipient’s standard computer back-up devices (which copies Recipient agrees not to access after termination).