When dealing with .rar files from unknown sources, especially multipart archives (Part 1, Part 2, etc.), it is critical to prioritize security:

If you have downloaded the first part of a series (e.g., part1.rar ), you generally need all subsequent parts (e.g., part2.rar , part3.rar ) in the same folder to successfully extract the full content.

: Right-click on part1.rar and select "Extract Here." The software will automatically pull data from the other parts to reconstruct the original file.