The 3.5” drive has reached 2TB with 2.5TB on the horizon the 2.5” HDD has struggled to math its big brothers ever increasing size. However Toshiba is releasing the MK6465GSX, the first 640GB 2.5” drive. The dual “plattered” hard drive also comes in 160GB, 250GB, 320GB, 500GB capacities. However it only spins at 5,400RPM therefore…