: The "(2)" suggests this specific file is a duplicate copy downloaded multiple times into the same folder, or a second version of that specific part. Game Data Details What is multipart archive - GitHub Gist

: This is a compressed archive format developed by Eugene Roshal. It is used to reduce file size for faster distribution.

: The original game file was too large for a single upload or storage medium (e.g., FAT32 SD cards which have a 4GB limit). It was split into multiple pieces.