Export Classic Google Sites Attachments to Google Drive Folder

code.gs

// Go to script.google.com, click "New Project", copy and paste this code in, and click "▷ Run" in the toolbar

function run() {

  let sites = SitesApp.getAllSites('example.com');

  console.log('Total number of sites: ' + sites.length);

  sites = sites.filter(site => {
    try {
      return site.getOwners().map(owner => owner.getEmail()).includes('you@example.com') ||
             site.getEditors().map(editor => editor.getEmail()).includes('you@example.com') || 
             site.getViewers().map(viewer => viewer.getEmail()).includes('you@example.com');
    }
    catch(e) {
      return false;
    }
  });

  console.log('Sites you\'re a part of: ' + sites.length);

  let root = DriveApp.createFolder('Sites Export ' + Utilities.formatDate(new Date(), 'America/Detroit', 'yyyy-MM-dd-hh-mm-ssz'));

  for (let site of sites) {
    console.log('Creating ' + site.getTitle().trim());
    let folder = DriveApp.createFolder(site.getTitle().trim()).moveTo(root);
    let attachments = site.getAttachments();
    for (let attachment of attachments) {
      DriveApp.createFile(attachment.getBlob()).moveTo(folder);
    }
  }

}