A-DATA Technology today announced its new 640GB 2.5-inch Portable Hard Drives which is aimed at users of mobile computers. This new line-up of portable drives offers a tremendous upgrade on the storage size without sacrificing portability of the device.

They comes with a stylishly-designed external casing and uses high-speed USB 2.0 interface to transfer files from or to a device. Also with the new A-DATA portable drives you get the free-download value-added applications HDDtoGO (no registration required) and Norton Internet Security 2009 (60-day trial). No pricing information available as yet.