Final answer:
For moderate security categorized media to be reused outside of an organization, it should be destroyed as per NIST Guidelines for Media Sanitation, ensuring data irretrievability.
Step-by-step explanation:
In the context of the NIST Guidelines for Media Sanitation, when dealing with moderate security categorization and considering media that will be reused and is leaving the organization's control, the appropriate action is to destroy the media. This is to ensure that any data previously stored on the media is completely irretrievable, safeguarding the organization's sensitive information. Destruction methods vary, but often include shredding, pulverizing, or incinerating the media, so that data recovery is impossible.