Hi Bilbo,
It is convenient to have a refrigerator in the garage, it has the space for a big home appliance and when you are working in the garage, easy access for some beverages.
Using a Samsung refrigerator in a garage is ok since the refrigerator is garage-ready, nothing special needs to be done to protect it. I have shared a Samsung video below that we encourage you to view for storing the appliance in the garage.
Storing your Samsung refrigerator in a garage or other outside environment:
https://www.youtube.com/watch?v=0vaUwXlPoIc
Leo