The phrase "Code postal" is the French term for "ZIP code." However, in the context of digital media archiving, it is almost certainly a "mondegreen"—a mishearing or mistranslation—of the controversial video game franchise, Postal . Developed by Running With Scissors, Postal is known for its over-the-top violence and dark humor. It is highly probable that "Code postal" was the result of an automated translation or a non-native English speaker’s attempt to catalog the game. Following this logic, "Night special" likely refers to a specific release, a "nightly build" (an experimental version of software), or perhaps a fan-made modification (mod) that alters the game’s setting to a nocturnal environment.

(Is it related to French postal codes, a specific software "code," or a project name?)

Unlocking the Archive: What’s Inside "Night Special Folder 6"?

Without more context, it's difficult to provide a specific solution. If: