Aluminum material and strong resistance: All corners of the box are reinforced with iron leather, and the structure is more stable and abrasion resistant. Made of high quality aluminum, the outer shell is striped and stylish design. It also protects the internal hard drive while increasing the durability of the main unit. Humanized design recessed embedded design, internal structure is stable and holds the hard drive to the maximum extent. The entire interior is made of EVA sponge, which absorbs vibration and impact damage, and protects your hard disk. Considering to replace the hard drive, the top of the sponge is made with a special "U" shape, making it more convenient when using.