This new external portable SSD is available in 250 GB, 500 GB, and 1 TB versions. It uses Samsung's proprietary 3D V-NAND technology, comes with a three-year limited warranty, and will launch globally later this month.
http://www.notebookcheck.net/Samsung-debuts-Portable-SSD-T1-starting-at-179-99-USD.134101.0.html