If you’re not interested in the dupe checking capabilities of NZBGet (I’m not), this is what works for me:
- Dupecheck: No
KeepHistory: 5 days
- in Sonarr/Radarr: Settings > Download Client > (show advanced settings) > enable Remove for both Completed Download Handling and Failed Download Handling
I rarely download things manually anymore, so this ensures the history of NZBGet stays nice and clean. On the off-chance that I do things myself, 5 days to remain in history is plenty of time because usually I’m waiting for that download to finish anyway so I do stuff with it as soon as it’s done and then delete it from the history as well.
So under normal operations, the history tab should always be empty. If there’s something in there, either it’s a manual download or something (sonarr/radarr) is not working properly (not processing finished downloads).