While there are many sites claiming to offer direct "free downloads," most legal ways to watch in 480p on portable devices involve ad-supported streaming subscription-based offline viewing Free Legal Streaming (Ad-Supported)
To download episodes for "portable" offline viewing (on a phone or tablet), you typically need to use the official apps of these streaming services: spartacus series free download in 480p portable
If you meant “portable” for a USB drive or mobile device, legal purchases often allow downloads within the app for offline viewing. While there are many sites claiming to offer