Mr3420 v5 usb not recognizing

i need Root expanded, sorry for not clarifying before.

tried this

it worked in other router,

not working here

ubus call system board
{
        "kernel": "5.15.137",
        "hostname": "router",
        "system": "MediaTek MT7628AN ver:1 eco:2",
        "model": "TP-Link TL-MR3420 v5",
        "board_name": "tplink,tl-mr3420-v5",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "23.05.2",
                "revision": "r23630-842932a63d",
                "target": "ramips/mt76x8",
                "description": "OpenWrt 23.05.2 r23630-842932a63d"
        }
}