Performance: SuperSpeed USB 3.0 (Max): 4.8Gb/s.Operating system: Windows 8/7/Vista, Mac OS X 10.4.8 or later.
In addition, both drives operate at USB 3.0 speeds without requiring any external power supplies. The P3 is available in a smart grey color while the M3 sports a slick black, patterned design. Samsung indicates that they are able to achieve a 4TB capacity in a compact drive due to the latest Samsung HDD technology. Previously available in only a desktop or bulky multi-drive internal form factor, the M3 and P3 Portable drives measure just 0.78 inches thin (which is only 1/10 of an inch thicker than their 2TB drive) and weigh only 8.3 ounces. Samsung HDD has announced the 4TB M3 Portable and the P3 Portable external hard drives, which are the first USB-powered single drive solutions of its capacity designed residing inside 2.5” cases.