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:
Please give those steps a try and let me know if you are able to connect afterwards!