- Firmware 0.1.9 or higher
opkg update
opkg install e2fsprogs
opkg install block-mount
umount /dev/<device name> /mnt (where <device name> = sda1 or mmcblk0p1, USB = sda1 / sd = mmcblk0p1)
mkfs.ext4 /dev/<device name>
mount /dev/<device name> /mnt/ ; tar -C /overlay -cvf - . | tar -C /mnt/ -xf - ; umount /mnt/
block detect > /etc/config/fstab
replace in file /etc/config/fstab
option target '/mnt/<device name>' -> option target '/overlay'
option enabled '0' -> '1'
reboot