Samsung HDD (http://samsunghdd.seagate.com), a division of Seagate Technology, has announced 4TB M3 Portable and the P3 Portable external hard drives, which the company says are the first 4TB USB-powered single drive solutions to come in 2.5-inch cases in the world.

“Previously only attainable in desktop or bulky multi-drive internal designs, we can now achieve a 4TB capacity in a compact drive thanks to the latest Samsung HDD technology,” says Dave Klenske, director of product line management, Samsung HDD. “By going to a single drive solution, we can power the drive through just a USB connection while fitting it into a case that is only a 1/10 of an inch thicker than our 2TB drive.”

The 4TB Samsung M3 Portable and the Samsung P3 Portable drives measure 0.78 inches thin and weigh only 8.3 ounces. They operate at USB 3.0 speeds without requiring any external power supplies.

The Samsung 4TB M3 and MP Portable hard drives will be available in late June. Pricing hasn’t been announced.