No fixed time—depends entirely on your connection and Xbox Live load.
| Download Speed | ~50 GB Time |
|---|---|
| 25 Mbps | 4.5–5 hours |
| 50 Mbps | 2–2.5 hours |
| 100 Mbps | 1–1.5 hours |
| 200+ Mbps | 30–45 min |
Pause other devices; use "Instant-On" mode (Settings → Power) for background download.