The external multi-bay S-35EX tower is designed especially for storage applications. The wide variety of the tower with hard drive cages is able to easily max the hard drive capacity up to five 3.5" bays or eighteen 2.5" bays for storing mass data. Optional 120mm cooling fan can be added to enhance the ventilation inside. The external NAS tower chassis with solid construction is a cost-effective and flexible solution for your critical data storage.