Instructions for expanding space for openwrt programs. In most cases, 2Gb will be enough. We will install the necessary packages for working with USB devices
root@OpenWrt:~# opkg update
root@OpenWrt:~# opkg install nano kmod-usb-core block-mount kmod-fs-ext4 kmod-usb-storage-extras e2fsprogs blkid
After install fdisk package