These labels indicate the technical attributes of the media. "2" typically signifies a second volume, second camera angle, or part two of a specific production series. "4K" specifies Ultra High Definition resolution (typically 3840x2160 pixels).
: You only need to right-click on the very first file ( part1.rar ) and select "Extract Here". The extraction software will automatically read the sequential data through to part10.rar and piece the original 4K video back together. Cybersecurity Risks with Fragmented Files FC2PPV-3620789-2-4K.part10.rar
If I know that, I might be able to offer more specific troubleshooting tips or safety information. These labels indicate the technical attributes of the media