How to check if volumed data is outside of Docker container?

Install/Maintain/Configure
1

I am running Gitea via Docker, and want to upgrade. In the documentation, in the upgrade section, one can read that:

:exclamation::exclamation: Make sure you have volumed data to somewhere outside Docker container :exclamation::exclamation:

As I am a Docker (and Gitea) noob, I wonder how I can check if the “volumed” data is stored inside or outside the Docker container. Help would be appreciated.

My docker-compose.yml reads:

version: "3"

networks:
  gitea:
    external: false

services:
  server:
    image: gitea/gitea:latest
    container_name: gitea
    environment:
      - USER_UID=1000
      - USER_GID=1000
    restart: always
    networks:
      - gitea
    volumes:
      - ./gitea:/data
      - /etc/timezone:/etc/timezone:ro
      - /etc/localtime:/etc/localtime:ro
    ports:
      - "443:443"
      - "222:22"
      - "80:80"

Using info from linuxhint.com, I found out that I have the following volume:

aa@bb:~/docker/gitea$ sudo docker volume list
DRIVER    VOLUME NAME
local     b49a906597a143a6c7ef4deca1ecc5d15e1872b9fab54782de573a8beb6af4b

$ sudo docker volume inspect b49ea906597a143a6c7ef4deca1ecc5d15e1872b9fab54782de573a8beb6af4b
[
    {
        "CreatedAt": "2022-05-04T06:46:13Z",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/b49a906597a143a6c7ef4deca1ecc5d15e1872b9fab54782de573a8beb6af4b/_data",
        "Name": "b49a906597a143a6c7ef4deca1ecc5d15e1872b9fab54782de573a8beb6af4b",
        "Options": null,
        "Scope": "local"
    }
]