I ran into a bit of a snag with one of my first crafts, an eachine e520s 5G 4K. I got it to work for the most part, but using the LW FPV app (which crashes far too often on my samsung galaxy S5) to take pictures or video results in everything being saved on the phone, despite having tried 3 different sd cards so far, a 128GB samsung and two 64GB sandisk ones. The cards are properly inserted into the quad, and are always empty when I take them out to check on my pc. Could anyone shed some light on this? Some settings I've missed perhaps? Thanks in advance!