The +exclusive may be:

To understand the allure, we have to dissect the name itself. Unlike standard piracy naming conventions (like Movie.Title.2023.1080p.mp4), this string defies utility.

Multi‑part RARs follow patterns like name.part1.rar, name.part2.rar etc.
Here part14 means this is the 14th segment. A full set would likely include parts 1–13 and possibly more after 14. Without other parts, part14 alone is unusable – it requires the preceding volumes (e.g., part13.rar) to extract.

The string juq320cpart14rar+exclusive suggests:

Possible contexts: software beta, confidential internal documents, media repack (games, videos, music), or a data dump from a private source.