To use the files inside Baldurs.Gate.3.Update.Holy.Knight.part05.rar , you must place all numbered parts ( part01 through the final part) in the exact same folder and extract only the first part ( part01.rar ) using an extraction program like WinRAR or 7-Zip.
Split RAR archives require every single segment to be present in the exact same folder to successfully combine and extract. Baldurs.Gate.3.Update.Holy.Knight.part05.rar
Open your computer's main directory where the base game is installed (for example: C:\Program Files (x86)\Steam\steamapps\common\Baldurs Gate 3 ). To use the files inside Baldurs