Archgon 1TB Ultra Slim Portable Hard Drive for Mac, Optimized for UASP mode (Compact Red) Buy with confidence-Build with original Western Digital 1TB drive model WD10SPCX inside Better performance. Optimized for UASP mode. 70% faster than USB 3.0 HFS+ journalized. Works right out of the box with your Mac Compatible with Apple Time Machine Ultra slim 0.37 inches height. Sleek case. 3 years limited warranty