This is part 19 of a split RAR archive. Large games are often split into smaller "chunks" (like .part01.rar , .part02.rar , etc.) to make downloading easier and to prevent a single error from ruining the entire download. 2. How to extract it
To get the game files out, you cannot just open part 19 by itself. You need to follow these steps: Monster.Hunter.World.Iceborne-PARADOX.part19.rar
If the archive asks for a password, check the site where you originally found the links; it is usually listed there. This is part 19 of a split RAR archive