Usb is not showing Openwrt 21

im using DSL-2750u Openwrt 21.02.1
im trying to do extroot
but my using in not mounting;
[ 4.918938] usbcore: registered new interface driver usbfs
[ 4.924856] usbcore: registered new interface driver hub
[ 4.930540] usbcore: registered new device driver usb
[ 5.474816] usb 1-1: new high-speed USB device number 2 using ehci-platform
[ 1276.601538] usb 1-1: USB disconnect, device number 2
[ 1281.463457] usb 1-1: new high-speed USB device number 3 using ehci-platform

i have installed these packages:-

root@OpenWrt:~# opkg list-installed | grep -E '(^kmod-fs|^kmod-scsi|^kmod-usb)'
kmod-fs-ext4 - 5.4.154-1
kmod-usb-core - 5.4.154-1
kmod-usb-ehci - 5.4.154-1
kmod-usb-ledtrig-usbport - 5.4.154-1
kmod-usb-ohci - 5.4.154-1
kmod-usb-uhci - 5.4.154-1
kmod-usb2 - 5.4.154-1

please help me i don't know a lot about it.
thanks