You can use advanced Google search operators (often called "Google Dorks") to find MEGA folder links that are publicly indexed. For example, you can try:
Gracias a esta combinación de privacidad, velocidad y capacidad, MEGA se ha convertido en una herramienta preferida para comunidades que compilan y distribuyen series completas. descargar series completas por mega ingles
You do not strictly need an account to download, but having one allows you to import folders to your own cloud before downloading, which bypasses bandwidth limits. You can use advanced Google search operators (often