Since my Ultrabook has built a very small SSD drive (128GB), I ordered the Integral Fusion USB flash drive with 64GB. Delivery was relatively quickly and after a few months of the stick still performs his work. Did this actually permanently hanging in the USB 3.0 port, because it is really small and colors also good for Ultrabook fits (Lenovo U330 Touch).
Can only recommend as far as the stick. Was the easiest, most cost-effective and almost best solution to expand my storage volume. Thanks to USB 3.0 it is even possible to load apps or games from the stick.