The design concept comes from the first historical all-metal commercial aircraft – Junkers F.13. A75 is currently the thinnest all-metal military grade hard drive on the market, its height of only 12.2mm with USB 3.1 Gen 1 ultra high-speed interface. The unique three-dimensional pleated design can strengthen the structure and reduce impact on the shell, making the surface not only durable but also scratchproof. The A75 all aluminum alloy body is light weight and has superior heat dissipation characteristics. In addition, A75 also passed the United States MIL-STD-810G 516.7 Procedure IV (Transit drop test), a freefall test from the military, providing users with a comprehensive data protection.