USB3 drive is mounted but no USB3 openwrt mount point Help!

Hi,
runnin x9s fm: 1.2.3

tryn to access usb3 drive via ftp and samba

no usb3 mount point is present in openwrt

and adding mount point via pull downs dont list the usb drive

can anyone explain what i am doing wrong or
offer a solution

tia

rc