^^ upgrade to a msata ssd. I did the same with my x220. it let's you keep your ssd/hdd which shipped with the laptop and benefit from an additional storage factor in the form of an msata ssd. msata ssds are priced on par with standard ssds and perform on par with standard ssds. I got myself a mydigital msata ssd from amazon - cost me about 6k shipped using sns. you can get a wide variety of msata ssds. make sure you upgrade to a bios version greater than 1.25 for better msata support / performance.