Currently it is stored in a docker volume. (the data available at /var/lib/docker/volumes path)
But changing just one line in a docker-compose.yml file you can mount it wherever you want on your host. See "data:/home" in there.
You can write there "/home/your-user/mysteamdata:/home", so that all Steam games (caches, saves, ...) will be available for you at your home directory in "mysteamdata" directory ;-)
But changing just one line in a docker-compose.yml file you can mount it wherever you want on your host. See "data:/home" in there.
You can write there "/home/your-user/mysteamdata:/home", so that all Steam games (caches, saves, ...) will be available for you at your home directory in "mysteamdata" directory ;-)