No problem Debbie. Your defrost drain is clogged. Instead of the water going down the defrost drain in the freezer
its going through the freezer floor.
In the freezer remove the screws in the panel with the blue arrows that I have drawn in the diagram below. That is the freezer floor.
Then remove the parts with the red arrows in the diagram. That is the back wall and airflow duct.
Behind those parts is the evaporator coil
that defrosts about every 10 hours. The drain for the defrost is in the floor directly under those coils, its just about the size of a dime. Dig out all the ice and clear that hole.
Once you get that done pour a little warm water down it to be sure its clear. If its not clear find something flexible and push down through it a couple of inches.
Go around behind your refrigerator and remove the lower panel then find the tube that comes out just over the drain pan. If there is a small amount of water in that pan you will be done. The water that drains into that pan evaporates.
That will take care of it, if you have further questions please ask. If you have no questions please leave a rating for me. Every rating is very important.
CLICK THE IMAGE TO ENLARGE THE DIAGRAM