I have tried two camera's (canon 6d and a canon 5d m2) and both have the same problem.
When using just an intervalometer with the above camera's I can use 64gig cards with no problem, but when using qdslrdashboard and the LRTtimelapse mode I can't. While using qdslrdashboard and the LRTtimelapse I have messages such as "PC FULL" or "CARD FULL", when in fact the card is only half full. I was using a Dell xps i7 laptop with windows 10.
I have also noticed that while using qdslrdashboard and the LRTtimelapse images are being saved to the computer, and as far as I know they should not be saved. I have also paid for the android version and will try that next.