Ok. So i tried MiniTool Partition. When i check "extend" partition i see a popup which says that it will create an overlapped volume and operation cannot be done.
Now i try to extend with gparted. Free space which i need to add to KOBOeReader partition is located at the beginning of the sd card. Trying to extend the KOBOeReader partition gives no result. It just simply not showing avaliable free space.
No any software let me add free space from the beginning of the sd card