I run the Juce Demo! and on the Audio demo, switch to the File Playback tab.
I see a treeview with files and directories, including Desktop and Documents, but nowhere do I find my drive letters, like C:\ or D:. Expanding Desktop shows me the files on my desktop but I don’t see My Computer, Network, or Recycle Bin. I have no way of browsing to my hard drives or network volumes.