[OpenWrt Wiki] Extroot configuration
openwrt.org › extroot_configurationNov 28, 2021 · After you make the extroot you will have all space you need to install secondary packages. Follow USB installation guideto set up USB storage in OpenWrt, then install packages needed for a partition with ext4 filesystem: opkg update opkg install block-mount kmod-fs-ext4 e2fsprogs fdisk 2. Configuring rootfs_data Connect with ssh to the device.