Accessing usb drive.

Hello. I have just installed the latest volumio on a PI 3. Have an external usb drive connected, all fine and dandy.
I see that volumio gives me access to an internal folder, can i somehow access the usb drive as well so i can transfer new music without having to disconnect?

Thank you very much.

Thank you so much Sonos. Will try this out…

ok, so i got it to show up now.

comment = usb
path = /media
read only = no
guest ok = yes

Is there a reason why I cant copy into it. ? says i dont have rites.