Venue 8 pro: Help please to move UserFolder to SDcard but encrypted

Hello everyone,

I've run out of space on the internal 32GB drive, especially because of my big Google Drive folder. My solution would be to move my UserFolder to an external 32GB sdcard, but I really need the data to be encrypted in case someone steals the device. I can't find a way to use the dell (or is it the one from win8.1) internal encryption with the extended SD-card. Using truecrypt container on the sdcard won't work i think, since the UserFolder needs to be thereon boot.

As the venue 8 pro is positioned as a mobile office solution, this feature must already be integrated right?

Any suggestions?