Log Download via ssh

Recently I tried to download all Logs on a UTM SG 230 for archiving purposes. Unfortunately the logs are too big to download in an archive. Now I'm asking myself how to get them -at present via ssh- but the loginuser has not the right to access /var/log. Is there a possibility to get them complete without moving them to /tmp  or is this action ok regarding not loosing the warranty for my product?