Having multiple branches is tough to manage so you shouldn't have to worry about moving a child between branches and what will happen to their data. With the move child feature it's just a few clicks and the child will be moved with all their information.
To move a child from one branch to another follow these steps:
Go to Child Profile
Select a child from the list of children in the room and a menu will appear, click Profile.
Click on About tab
Choose the Registration info tab
Click the Edit button
Select the setting the child is moving to from the drop down-menu
Choose the class the child is moving to
Click the Save button
Note: The child will become withdrawn from the current institute.