Then copy the sample.conf to a new file, e.g. `cp sample.conf my.conf`, open the new conf file, e.g. with `nano my.conf`, edit all values that are marked with `# TODO!`, close and save the file.
Now copy the provided yaml file to a docker-compose file by running on x64 `cp latest.yml docker-compose.yml` and on arm64 `cp latest-arm64.yml docker-compose.yml`.
Since the AIO containers may change in the future, it is highly recommended to strictly follow the following procedure whenever you want to upgrade your containers.
1. Run `git pull` in order to get the updated yaml files from the repository. Now bring your `docker-compose.yml` file up-to-date with the updated one from the repository. You can use `diff docker-compose.yml latest.yml` on x64 and `diff docker-compose.yml latest-arm64.yml` on arm64 for comparing.
1. Also have a look at the `sample.conf` if any variable was added or renamed and add that to your conf file as well. Here may help the diff command as well.
If you leave `NEXTLOUD_DATADIR` in your conf file at the default value of `nextcloud_aio_nextcloud_data` and don't modify the yaml file, all data will be stored inside docker volumes which are on Linux by default located here: `/var/lib/docker/volumes`. Simply backing up this location should be a valid backup solution. Then you can also easily restore in case something bad happens. However if you change `NEXTLOUD_DATADIR` to a path like `/mnt/ncdata`, you obviously need to back up this location, too because the Nextcloud data will be stored there. The same applies to any change to the yaml file.
Obviously you also need to back up the conf file and the yaml file if you modified it.