Initial setup of Volumio cannot see files on usb stick

Just installed Volumio.
I can get volumio to scan my usb drive with all my mp3s on it. It sees the USb folder but when I click on it it only sees directories and no mp3s

You will need to provide more information on your system.

Platform Volumio is installed on
Volumio version
Other details of what’s connected and how you access it
How is the usb drive organised, folder structure, filename examples

With for example a Raspberry Pi 3 or 4, a new install of Volumio works out of the box with a USB music drive.