To use this, you must have all parts in the same folder. You would then right-click part01.rar and select "Extract Here" using a tool like WinRAR or 7-Zip . Safety & Legality Warning
Marvel's Midnight Suns is a tactical RPG developed by Firaxis Games. The Legendary Edition includes the base game, the Season Pass (adding characters like Deadpool, Venom, Morbius, and Storm), and various premium skins. Marvels.Midnight.Suns.Legendary Edition.part04.rar
If you are missing other parts, Part 4 is essentially useless data. To use this, you must have all parts in the same folder