ext4 usb disk

I am new to Volumio. I really like the concept of having a lightweight audioserver so I bought a CuBox-i4Pro, put Volumio on a MicroSD card and everything seems to work fine. Except Volumio doesn’t recognise my usb disk which is ext4. Is it possible to connect a ext4 usb disk to volumio? It would seem strange if it wouldn’t be, since Volumio is linux?

I am using an ext4 USB drive with absolutely no prroblem…

have you mounted the disk?

Initially I did, but at next reboot it was mounted automatically.