Ext-root via USB driver Virgin 

ssh root@192.168.1.1

sysupgrade -r /tmp/backup-*.tar.gz

opkg update

# Linksys WRT1900ACS and Linksys WRT3200ACM 
# in insomnia, it is pre installed
opkg install kmod-usb-core e2fsprogs kmod-usb-storage kmod-fs-ext4 kmod-usb-storage-extras block-mount kmod-usb3 blkid block-mount fdisk 
# kmod-scsi-core kmod-usb2 
opkg install kmod-usb-core kmod-usb-ledtrig-usbport kmod-usb-storage kmod-usb-storage-uas kmod-usb-uhci kmod-usb3 kmod-usb2 libusb-1.0 usbutils

# lsusb
# nano /etc/modprobe.d/ignore_uas.conf
# options usb-storage quirks=0bc2:2320:u
# reboot

# in insomnia, it is pre installed
insmod xhci-mtk

###################
# v21.02.5		
# mv /etc/config/system /etc/config/system.old 
# mv /etc/config/network /etc/config/network.old
# always regenerate and then fix it
# renaming those to network.old and system.old before sysupgrade is sufficient
###################
mv /etc/config/system /etc/config/system.old 
mv /etc/config/network /etc/config/network.old

mkfs.ext4 /dev/sda1
# say yes

# if you already have it and it is not
# overlay, then you do not need it,
# it will work
# non overlay is working,
# but if the HD is virgin you need an ext4 filesytem
# CAREFUL TO DELETE STORAGE DATA! 
# mkfs.ext4 /dev/sda3
# say yes

mkdir -p /media/storage

/sbin/block detect > /etc/config/fstab; sed -i s/option$'\t'enabled$'\t'\'0\'/option$'\t'enabled$'\t'\'1\'/ /etc/config/fstab; sed -i s#/mnt/sda1#/overlay# /etc/config/fstab; cat /etc/config/fstab;

# set /dev/sda3 -> /media/storage
nano /etc/config/fstab

# built the overlay into the drive
mount /dev/sda1 /mnt ; tar -C /overlay -cvf - . | tar -C /mnt -xf - ; umount /mnt

swapon /dev/sda2


# is it good? then we are good! if it is not, uncheck Keep settings 
# install the factory now and redo from creating the partition
# finally 
# check show fstab, might dont need again
uci show fstab 

uci commit
reboot && exit

# wait so that the network is connected
ssh root@192.168.1.1 # if you have existing then there like 192.168.1.1

uci show fstab 
cat /etc/config/fstab
df -h 

# THIS IS MY OWN SETUP
# if the WAN is not DHCP then have to restore the config first
# this is my own setup, you don't needed
# just in my /dev/sda3 i have monthly, weekly and daily backup
mkdir -p /opt/ 
cd /opt 
git config --global http.sslVerify "false" 
git clone https://git.patrikx3.com/router-scripts-openwrt.git 

cd router-scripts-openwrt
npm install

# an error with dnsmasq-dhcp wrt3200acm/wrt32x
# /etc/dnsmasq.confg => except-interface=eth1.2

./init-router
reboot && exit

# have to make sure that ./image-builder-files/etc/sysupgrade.conf includes in /cgi-bin/luci/admin/system/flashops/backupfiles

openssl engine -t -c