Portable Expansion External Hard Drive 500GB 1TB 2TB USB 3.0 2.5" Ultra Slim HDD. Ultra-Slim 2,5" External Hard Drive Disks USB 3.0 500GB 1TB 2TB PC Expansion HDD. 160GB≈149GB, 250GB≈232GB, 320GB≈298GB, 500GB≈465GB, 750GB≈698GB, 1TB≈931GB, 2TB≈1.81TB, 4TB≈3.63TB.
