Ensure all parts have the exact same name except for the part number (e.g., SPORE.Kolekcja.GOG.part1.rar ).
You only need to right-click and "Extract" the first file; WinRAR or 7-Zip will automatically pull data from the subsequent pieces. SPORE.Kolekcja.GOG.rar
The file is typically associated with a Polish repack or archive of the Spore Collection (including the base game and expansions like Galactic Adventures and Creepy & Cute ). Ensure all parts have the exact same name