Go to justwatch.com and search "Furiosa A Mad Max Saga." This tells you exactly which services offer purchase/rental in your country today.
Find the film in your library. Look for the "Download" button or cloud icon. Click it. The file will save to your device’s internal storage.
Choose a store: Apple TV (best for Apple ecosystem), Amazon (best for Fire TV/Android), or Vudu (best for Walmart users).