Some sites offer direct downloads (often for a fee). Be cautious and ensure the site is legitimate to avoid scams and malware.
For the serious archivist who wants a local, permanent 720p file, this is the "grey area" but often defended as fair use (for backup purposes).
Please use legitimate and safe methods to access Breaking Bad, and respect the creators and rights holders of the content.
Once you finish Breaking Bad , you will inevitably want the sequel movie ( El Camino: A Breaking Bad Movie ) and the prequel ( Better Call Saul ). A search for "breaking bad all seasons 720p download" usually extends to these titles.