im using a Samsung galaxy tab a 8 inch. I have a 32 gig sad card in tablet and 64 gig sd in my p3a. I see some videos and photos in my tablet gallery and others in my Dji library on app. I am unable to make movies on the app and I cannot seem to plug my tablet into my iMac usb to upload onto computer as iMac does not see tablet as a usb device. Any help on this is appreciated.