Steel file cabinets are generally highly resistant to humidity or moisture. The steel construction of these cabinets provides a sturdy and durable barrier against moisture, making them less susceptible to damage or corrosion caused by high humidity levels. Additionally, many steel file cabinets come with features such as powder-coated finishes or protective coatings that further enhance their resistance to moisture. However, it is important to note that prolonged exposure to excessive humidity or direct contact with water can still potentially cause some degree of damage to the cabinet, such as rust or warping. Therefore, it is recommended to maintain a controlled environment and take necessary precautions to keep the cabinets dry and prevent any potential moisture-related issues.