Picoreplayer can't see my usb stick

Hi,

I am a new user to the Picoreplayer, having previously used volumio with LMS as a plugin.

For the Picoreplayer, I am able to get music streaming and airplay to work. But Picoreplayer is not able to see my usb stick (FAT32, 256G, works well with volumio via LMS plugin). I tried to follow all the instructions I can find - installed and enabled additional file extensions, installed util-linux.tcz extension. But my usb stick just could not be seen. I remove the drive and connect to my mac and I can see it. What more can I try to make it work?

Thank you.