Installing OpenWRT with extroot on TP-LINK TL-MR3020

Unfortunately, my tries to get installed a pre-compiled firmware on TL-MR3020, which I found in openwrt web page, wasn’t enough to my needs. I mean, if you want just install and use, yes, it work without problem, but, extroot config can’t just work, that’s because the device doesn’t has enough free space to install all …