Vindi, Could the Model be EB19MK1LWRO?
It sounds like the evaporator motor. It should be located behind a panel in the rear of the freezer.
I think this is an early stage of failure. Some bearing wear and the lubrication has dried up. The squeel is the motor shaft vibrating in the bearing. Then as it warms up it get a bit of lube and quiets down I have gotten more life by getting some oil into the packing but because of the need for reliability I'd replace the motor. Should be around $40. I wanted to include a picture of the motor for you but I don't know how to do that. I hope this help you.
Jim

I think I got the pic to show...