HTC desire 816 insufficient space error
It looks like Android 4.4 does not support installing apps to SD Card.
Your best bet is to root your phone, then install an app that will enable you write to the SD Card.
Those steps will get you as far as writing to the SD Card. I don't have a device that I can test this on, but these steps look like they might work for having apps install to the SD card by default. Let me know if you have any luck!