Since this is the second part of a multi-part compressed archive, a logical "feature" for it would be an system. Proposed Feature: "Smart-Link" Integrity Sync
Given the "TMH" and "sc" codes, this might be related to: sc25068-TMH.part2.rar
: Allows you to "peek" into the contents of the full archive (e.g., viewing a 3D model or document index) even if only Part 2 is currently downloaded, by using metadata headers. Since this is the second part of a