TWRP BACKUP image from KIII pro
1. Format USB flash drive in FAT32.
2. Place recovery.img (see attachment below and unzip it) to the root of flash drive.
3. Unplug power cord from TV box. Plug USB drive and the mouse.
4. Press and hold with toothpick the hidden button in round hole in the bottom of the box.
5. Plug in power while pressing that button.
6. Release the button when logo appears.
7. Choose language.
8. Make backup of system and boot partitions with compression enabled.
9. Reboot system. Find "TWRP" folder in your internal storage