**First make sure Radarr has permissions to write and read the `/download`, and `/movies` folders**. Do this by ensuring the `radarr_movies_directory:` and `radarr_download_directory` settings are correct.
Radarr will get the file path from the Download client. On default settings with Transmission the path is `/storage/downloads/complete`. You will need to create a path mapping in the **Remote Path Mappings** settings under **Download Client** to point to your internal path that is by default `/downloads`. *If you have difficulties with the path mapping you could also just add a new volume path for the Transmission container and use `/downloads` as the download directory.*
For Radarr to understand that the `/movies` folder is a folder, you'll need to add a new subfolder into it.
You can also do this by adding a random movie to the folder. Keep in mind to have the internal setting **Create empty movie folders** on **yes**
Comprehensive setup information can be found on the [Radarr github wiki](https://github.com/Radarr/Radarr/wiki/Setup-Guide)