cache

Hello! I'm new here. I got my Spark not so long ago. I've been wondering, are the cache images and videos stored on my phone HD quality? I don't have a computer at the moment so I use my phone. I checked out the cache images file but they do not seem too HD quality. Help!

I've seen a Youtuber suggest getting a dedicated device to use when flying the spark. I currently use my daily Pixel XL and it is always a hassle to turn off mobile data then connect via WIFI to the RC. Also, the cache stores takes up tons of room. Wondering if anyone else uses a dedicated...