Shadow Mini&trade; External 256GB USB 3.1 Portable Solid State Drive SSD Interface: USB 3.1 (Up to 575 MB/Sec). Dimensions: 4.0 x 2.3 x 0.40 Inches Rock-solid durability - No moving parts, able to withstand high impact (1500Gs operating shock) Aluminum housing provides excellent protection and heat dissipation Compatible with USB 3.1 / 3.0 / 2.0 Backed by a 3-year warranty