Conan.exiles.complete.edition-codex.part04.rar -

Right-click on and select "Extract Here" or "Extract to..." using software like WinRAR or 7-Zip.

Based on the CODEX release, this version typically includes the base game along with numerous DLCs and expansion content: Conan.Exiles.Complete.Edition-CODEX.part04.rar

The software will automatically find the other parts (including part04) and combine them into a single ISO or folder. Contents of the "Complete Edition" Right-click on and select "Extract Here" or "Extract to