def METHOD_NAME(csv_file, path, file_name):
    """
    Split csv file into smaller files.
    :param csv_file: Main csv file with all columns
    :param path: Path to save output files
    :param file_name: File name
    """
    cols = csv_file.columns
    n = 4999
    cols_split = [cols[i:i + n] for i in range(0, len(cols), n)]
    for idx, sp in enumerate(cols_split):
        csv_file[sp].to_csv(os.path.join(path, f"{file_name}_{idx}.csv"), index=False, header=False)