D Opus not showing DVD drive

If I open File Explorer in windows, it shows the DVD drive as drive F, but it does not show as being there in D Opus?

Try checking Preferences / Folders / Virtual Folders / Show empty disk drives.

That's great, thank you. It is showing now in the right panel, but not in the list of drives in the left panel?

Ah, yes, there is a separate option for the tree in Preferences / Folder Tree / Contents

Very kind of you to respond so quickly. Thank you very much.