[OpenWrt Wiki] Image formats
https://openwrt.org/docs/techref/image.formatPreviously known as trx image, sysupgrade is designed to be flashed from OpenWrt/LEDE itself 2). Commonly used when upgrading. Specific formats ext4 This firmware contains a regular ext4 Linux partition. Mostly used in x86 and x86_x64 systems. squashfs This firmware contains a type of partition that is compressed and mounts read-only.
[OpenWrt Wiki] Extroot configuration
openwrt.org › docs › guide-userNov 28, 2021 · 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. DEVICE="$(sed -n -e "/\s\/overlay\s.*$/s///p" /etc/mtab)"uci -qdelete fstab.rwm
[OpenWrt Wiki] Quick Start for Adding a USB drive
openwrt.org › docs › guide-userMar 07, 2021 · The Goal: This guide describes how to add a single USB stick or drive to your OpenWrt device. The result will be a USB drive with an ext4 file system and mounted at /mnt/sdXX (where sdXX is the name of the USB). This is all you'll need for most purposes, however, there are plenty of options described below. Requirements
[OpenWrt Wiki] Filesystems
openwrt.org › docs › guide-userJul 29, 2021 · OpenWrt/Linux filesystems There are 2 main native Linux filesystems you are going to be interested in, ext4 and f2fs. In short: ext4 is best suited for hard drives f2fs is best suited for flash drives (SSDs and usb thumbdrives) Set up ext4 This command will download the tools needed to create and fix ext4 (and older versions) opkg install e2fsprogs