Thanks for reaching out. Based on your description, it looks like Windows is blocking access to the Nucleus/ROCK internal storage due to its security settings regarding “Guest” access.
This is a common behavior in recent Windows updates (10/11), where the system automatically blocks network shares that don’t require a password. Since Nucleus is designed to be accessible without a password for convenience, Windows essentially puts up a barrier.
We have a step-by-step guide on how to adjust this setting in Windows so you can copy your music files:
To Answer Your Security Question:
Please don’t worry—running those PowerShell commands does not make your entire home network less secure. Microsoft disabled insecure guest logons by default in Windows 11 as a broad compliance measure to prevent PCs from connecting to malicious network shares in public environments. Because your Nucleus sits safely behind your home router/firewall and doesn’t hold any sensitive personal data, enabling this setting on your Surface Pro carries virtually zero real-world risk, provided you aren’t using your Surface on untrusted public Wi-Fi networks. Your home network remains perfectly safe.
If you are still concerned, we have completely upgraded our backend file-sharing engine from the legacy Samba 1 stack to Samba 4. As part of this modernization, RoonOS 3.0 now supports a standardized credential handshake to easily satisfy Windows 11 security policies without requiring users to mess with registry keys or group policies.
Please give those steps a try and let me know if you are able to connect afterwards!