Watch out for this one! The apple TV doesn't have what is known as "persistent storage" This means it decides how much space to allocate to each app, not you.
It does this with the users best interest at heart. You wouldn't want to be getting towards the end of a ride and have the Apple TV stop tell you'd run out of space.
Streaming also takes up space while a ride or Netflix video etc is being played, so FulGaz downloads may get deleted without warning - even if the video being played was on Netflix. There is nothing we can do about this, it is defined at the Apple TV operating system level.
To get around this problem it's possible to connect FulGaz for Apple TV to an external hard drive or computer on your network. You can find full instructions on how to do this in the link below.