Right-click Warhammer 40000 Darktide v1.0.372.0.part01.rar and select or "Extract to [Folder Name]" using software like WinRAR or 7-Zip .
: This usually means part02.rar (or another part) was downloaded incorrectly. You may need to redownload that specific part. Warhammer 40000 Darktide v1.0.372.0.part02.rar
If you are using this for a specific modded environment or private server, ensure your launcher is pointed to the binaries folder within the extracted directory. Right-click Warhammer 40000 Darktide v1