One of the key "features" of multi-part RAR files is the use of Recovery Records . If part05 were to become slightly corrupted during a download, the archive software can often use redundant data stored within the file to "self-heal" without needing to re-download the whole set.
Filenames like this follow strict naming conventions established by the "Warez Scene" in the 90s and 2000s. The structure is designed for automated scripts to verify, download, and reassemble files across high-speed servers. sc24803-TQDE.part05.rar
What makes this file interesting isn't just what's inside, but the it represents: One of the key "features" of multi-part RAR