Remove "Copy of" filename prefix when copying an entire folder from one Google Drive account to another Google Drive account

Drive rename.js

/* Need to copy an entire folder from one Google Drive account to another Google Drive account? 
 * 1. Right-click on original folder in Google Drive
 * 2. Share with the destination Google account
 * 3. Go into destination account's Google Drive
 * 4. Find the shared folder under "Shared with me"
 * 5. Select all the files (Ctrl-A / Cmd-A)
 * 6. Right-click, Make a copy
 * 7. Create a New Folder in destination account's Google Drive
 * 8. Go to Recent
 * 9. Select all recently copied files and move to the new folder
 * 10. Great, except all the filenames begin with "Copy of"xxxxxx.txt
 * 11. Create a new Apps Script, perhaps using Google Sheets, and use the below script to remove the "Copy of" filename prefix!
 */

function fileRename() {
  var folders = DriveApp.getFoldersByName('FOLDERNAME');
  var folder = folders.next();
  var files = folder.getFiles();
  
  while(files.hasNext()){
    var file = files.next()
    var fileName = file.getName();
    if (fileName.indexOf('Copy of ') > -1) {
        fileName= fileName.split('Copy of ')[1];
        file.setName(fileName);
    };
  };
}

Thank you, it was really useful!