Backing up TA partition instructions for Sony Xperia M2 Aqua topic

Hello. Me and the guys from 4pda.ru invented and embodied the bold idea.
In order to make a backup of TA, you just need to flash Android 4.3 for D2303 and get root access through Towelroot and save TA through known methods
Then you can flash your stock. And then open the boot..
Original post 4pda.ru