I dont know if you have a side by side or the freezer is on top,but thats a fairly common thing and the following is what i already wrote before what to check when it leaks like your experiencing.SIDE BY SIDE
The water is from the melted frost of the defrost cycle. The drain at the bottom of the back wall of the freezer is blocked so instead of the water draining into the pan where it will evaperate,it's pooling on the freezer floor
and freezing, in many case when the floor indent is full the water will leak onto the floor.By pulling the refrigerator out from the wall,there will be a tube behind the service panel on the right side when looking at it from the rear,that tube can be removed and cleared,then clear the nozzle it connects to inside the freezer. FREEZER ON TOPThat water is from the melting frost of the automatic defrost cycle. Their is drain in the freezer behind the back wall under the evaperator coil that is blocked, so instead of defrost water draining it's pooling in the freezer or in some case espically on models with the freezer on the top,the water is leaking from the freezer vents into the fresh food compartment.
The way to clear the drain is remove back plate and remove all ice build up and GENTLY make a small hole in drain through then totally flush w/warm water.
The exact location of drain is under the coil behind back freezer plate in the center I hope this will hepl you to fix that leak,GENE