You were correct, thank you so much. The apps were in the default network docker0. I looked into it, and the easiest option for my situation was simply to create another bridge network and move my apps into that. Now readarr can find Host = Calibre.

For torrents I don’t have an incomplete folder. As I’m using a seedbox it doesn’t seem necessary.

Interesting idea, I’ve never done this before. I tried opening the console from within the sonarr portainer container. That failed with “unable to retrieve image details”

On searching this, I was able to connect using:

sudo docker exec -it sonaar bash

This put me at the root of the container, and from there, I could navigate through:

root@xx:/data/torrents/rtorrent/Completed/tv-sonarr

From there I could see the file. But the permissions were for user abc and group “users”. But I found the same when I browsed to the usenet downloads area, so I think this is more because of the way I logged in to root. I don’t have any issues with usenet and sonaar. ID from there shows my uid as 0 and gid 0

That’s great, thank you, will get on it tomorrow. Will I need to change permissions on the media folders?