Install openwrt onto WNDR3700v4 from factory image

Download openwrt image
openwrt-ar71xx-nand-wndr3700v4-ubi-factory
https://downloads.openwrt.org/barrier_breaker/14.07/ar71xx/nand/

Install with update feature from web interface

Issue of of 2014.10.2 version

Unable to use the 128MB flash space.

Status of 2014.10.2 version