code: def _file_to_folder(gi, fname, sample_info, libitems, library, folder):
      
      full_name = os.path.join(folder["name"], os.path.basename(fname))
  
      # Handle VCF: Galaxy reports VCF files without the gzip extension
      file_type = "vcf_bgzip" if full_name.endswith(".vcf.gz") else "auto"
      if full_name.endswith(".vcf.gz"):
          full_name = full_name.replace(".vcf.gz", ".vcf")
  
      for item in libitems:
          if item["name"] == full_name:
              return item
      logger.info("Uploading to Galaxy library '%s': %s" % (library.name, full_name))
      return gi.libraries.upload_from_galaxy_filesystem(str(library.id), fname, folder_id=str(folder["id"]),
                                                        link_data_only="link_to_files",
                                                        dbkey=sample_info["genome_build"],
                                                        file_type=file_type,
                                                        roles=str(library.roles) if library.roles else None)
docs: Check if file exists on Galaxy, if not upload to specified folder.