I tried the other mounting of the card with a link through disk management and it didn't work at all. Thanks for this tip. I've been trying to get this to work for MONTHS!
Just a few notes that might be helpful
The syntax in cmd that worked for me on the surface pro was mklink C:\Users\name\Dropbox X:\Dropbox
with this syntax mklink /X C:\Users\name\Dropbox X:\Dropbox it kept telling me that X was an invalid switch so I just removed the /x and it worked like a charm.
When I started Dropbox again it said it lost the link to the dropbox folder and needed to relink. I just left the folder as I originally used in setup C:\Users\name\Dropbox and it picked up the link just fine and everything is now syncing to the X:\Dropbox card folder set up with the link.
As I set up Dropbox, I picked a very small folder through selective sync to make sure everything was working correctly. In the past I tried setting dropbox up before with other techniques and it started deleting my files on the cloud! So far so good this time around. It will save your files for at least 30 days, so check on it occassionally to make sure you aren't deleting anything you don't want deleted.
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