637L: The total internal storage volume of the appliance, which is 637 Liters (gross volume). This is an expansive, extra-large capacity designed to store large quantities of groceries, making it perfect for big families or busy households.Side by Side: The architectural layout of the refrigerator doors. It features two full-length vertical doors sitting next to each other. Typically, the entire left side acts as the freezer compartment, while the entire right side serves as the fresh food refrigerator