Sonoma FTP file sharing to users not on same network

You can technically enable FTP on macOS Sonoma, but Apple discontinued its native FTP server years ago — and for good reason. FTP sends both usernames and passwords in plain text, making it completely insecure across the internet.

The simplest and safest route is to use SFTP. macOS already runs an SSH server that you can enable in System Settings → General → Sharing → Remote Login. Once that’s turned on, you can connect from Germany using any SFTP client (like Transmit, ForkLift, or even Finder with “sftp://your.public.ip”). You’ll just need to forward port 22 on your router to your Mac Studio and ideally secure access with a strong password or, preferably, SSH keys* If your public IP changes, using a dynamic DNS service (like DuckDNS or No-IP) keeps it reachable.