I moved that to a different volume the contents are shown below:
root@discourse:/var/discourse# ls /mnt/volume-2/standalone/ -al
total 64
drwxr-xr-x 16 root root 4096 Feb 5 2021 .
drwxr-xr-x 3 root root 4096 Aug 30 2020 ..
drwxr-xr-x 3 1000 www-data 4096 Aug 30 2020 backups
drwxr-xr-x 10 root root 4096 Nov 20 08:35 letsencrypt
drwxr-xr-x 4 root root 4096 Aug 30 2020 log
drwxr-xr-x 2 systemd-resolve input 4096 Aug 30 2020 postgres_backup
drwx------ 19 systemd-resolve input 4096 Nov 20 12:01 postgres_data
drwx------ 20 uuidd uuidd 4096 Feb 5 2021 postgres_data_old
drwxrwxr-x 5 systemd-resolve input 4096 Nov 20 12:01 postgres_run
drwxr-xr-x 2 messagebus syslog 4096 Nov 20 08:38 redis_data
drwxr-xr-x 2 root root 4096 Dec 1 2020 ssl
drwxr-xr-x 3 root root 4096 Aug 30 2020 standalone
drwxr-xr-x 4 root root 4096 Aug 30 2020 state
drwxr-xr-x 4 1000 www-data 4096 Nov 20 08:36 tmp
drwxr-xr-x 2 root root 4096 Aug 30 2020 uploads
drwxr-xr-x 4 root root 4096 Aug 30 2020 uploads.orig