I have a Raspberry Pi 3 that is not in use today. I think I am going to install Ubuntu Mate on it an use it as a file-server. I have a 1 TB disk that I can connect with USB to the RPI3. I will use it as a backup server and perhaps install Nextcloud on it later if possible. I used it as a Ubuntu server earlier, but I was not sure of the security even if it is only on my Lan. If i install Ubuntu Mate and turn on the firewall and only use Samba share that is built in Caja filemanager from Software Boutique, is there something else I have to consider?
Thanks.
Laffen.
PS! English is my second language, not 100%