Explanation:

Files in a user’s private library are by definition accessible only to that user. They don’t inherit the broader record sharing model because they aren’t attached to a record; they live solely in the user’s personal Files Home. Even managers above in the Role Hierarchy (A) or users with “View All Data” (B) can’t see another user’s private library content. To share, the owner must explicitly publish or share the file with specific users or groups.