Open Right Side Media Bay
Click on the Home (picture of a house)
Show All Folders (in the right side top of that page)
Deselect Show/Hide Attribute Filters (in the top right menu bar of the page that opens)
Home (picture of a house)
File Browser
Navigate to your folder that wasn’t showing any contents and everything should now be showing below in the sound selection window.
I managed to get that from the Cubase Help Centre…here
