You can't customize the image that way, using the image builder.
There's plenty of flash chip upgrade threads at the forum, here's one Upgrade TP-link_TL-WDR4300 from 8M to 16M flash.
You can't customize the image that way, using the image builder.
There's plenty of flash chip upgrade threads at the forum, here's one Upgrade TP-link_TL-WDR4300 from 8M to 16M flash.