How to change the folder that host all the certificates?

It sound like good solution but when I add this setting to my global options it’s Caddy not working and don’t write any log.
This is my full Caddyfile that doesn’t work now:

{
        debug
        storage file_system {
                root /etc/caddy_efs/caddy
        }
        log global_log {
            output file /etc/caddy/log/requests.log {
                roll_size 1gb
                roll_keep 5
                roll_keep_for 720h
            }
        }
}

https://

tls xxxx@xxxx.com {
    on_demand
}

reverse_proxy 76.223.xxx.xxx {
    header_down -server
    header_down -proxy-cache
    header_down -proxy-cache-tag
}

If I remove the new storage setting it’s working.