If you are writing specifically about technical issues with multi-part downloads:
: Repackers like FitGirl usually provide a tool to verify the integrity of files before installation to see if part2 is corrupted. Immortals - Fenyx Rising [FitGirl Repack].part2...
: If an archive extraction fails at a specific percentage corresponding to part2 , that specific file is likely incomplete. If you are writing specifically about technical issues