: Files named this way are frequently found in "Repacks" (like FitGirl or DODI) or digital backups
: If you are looking for specific game progress (like a "Part 6" of a walkthrough), this file is likely just raw game data and not a save file NeedForSpeedHeat.part6.rar
: Verify that part6.rar has the same file size as the other parts (except the final one) to ensure it isn't a corrupted download : Files named this way are frequently found