The WLAN card will work.  An mSATA drive will almost certainly not (and absolutely will not work other than for storage -- i.e., not for the operating system).  
I need to upgrade my wifi card (pictured) to use ac or n protocol.  Will this card work?    Intel Dual Band Wireless-AC 7260 ( [URL]  ) I see there is an empty WWAN slot, can I use an mSATA SSD?[IMAGE]
Dell Studio 1537 hardware upgrade