Most uploaders split this specific archive into 500 MB chunks.
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
If a .sfv or .md5 file was included in the download, use a checksum tool to verify that none of the pieces are corrupted, as a single byte error in one "piece" will cause the entire extraction to fail. Most uploaders split this specific archive into 500
Ensure all parts have the exact same name except for the part number (e.g., SPORE.Kolekcja.GOG.part1.rar ). SPORE.Kolekcja.GOG.rar