Live track and Flights Recorder doesn't work since May.
On my new SM-J730G with Android 7.0, that I purchased in May, I never get recorded flights, nor Live tracks either.
After start the application, a label shows: "Not removable storage device".
I tried to install it several times, and storing data on the SD and in the phone memory as well, and never worked.
My acount is verified on Air Navigation Services, and tracking services enabled.
When in flight the labels: Track Flight started and finished are showed.
It's also enabled Flight recorder, but there is not recorded flights.
This question has received the maximum number of answers.