you have to find a tutorial for installing your power button on ArchLinux.
- Get access to the console: Use SSH from your PC
If you are not familiar with SSH read this for Windows or this for Linux/MacOS The default login for RuneAudio is "root" with the password "rune" (without quotes).
- Use sftp to access files on Rune Audio: Get WinSCP from here and install it. When it opens setup the following: - Session File Protocol: SCP Host name: The IP address of you Raspberry Pi User name: root Password: rune
That's it, connect and you can transfer files just by dragging and dropping.