Hi,
Appears as though there may be a defrost problem.
This could be caused by a faulty defrost heater, faulty defrost sensor, blocked drain leading from under the evaporator unit in the freezer to the evaporator pan under the compartments or perhaps a faulty control board.
Here’s the [https://www.manualslib.com/manual/1173952/Samsung-Rf4287hars.html?page=56#manual|troubleshooting] section of the service manual. This will hopefully give an error indication which will tell you what the problem is, when you run the refrigerator in test mode.