Drag SDTV above 720p.
Set 720p as the cutoff.
Done.
- First search returns SDTV and 720p? sonarr will grab SDTV because it meets the cutoff quality, and it is higher in the list than 720p so more desirable.
- First search returns only 720p? sonarr will grab it because it meets the cutoff quality.
- First search returns only SDTV? sonarr will grab it because it exceeds the cutoff quality.
In all 3 cases, when something new is found on RSS or search when you already have a file, it will not be downloaded because you already have a file that meets or exceeds the cutoff.