Often refers to a specific project code or versioning tag.
The .part1 suffix means this file is incomplete on its own. You must have all subsequent parts (e.g., .part2.rar , .part3.rar ) in the same folder to successfully extract the full contents. Naming Breakdown: sc23970-CDSv100166.part1.rar
Install an extractor like WinRAR or 7-Zip . Often refers to a specific project code or versioning tag