I just got a dell e6500 for work and I'm looking at upgrading it. I noticed some slots, I know the wwan port is for a lte card, but can it be used for an ssd? Also seeing a fcn option is this useful to me at all? Aside those there is an umd card slot. I have no idea what the umd lot is for. Lastly the card has a smart card slot. What is it and can I use it? Sorry for so Many questions