A:AnswerI don't know exactly how much storage space is on the TV but, I've loaded dozens of apps from the Roku app store onto mine. Just like I have on my Roku 2 and 3. Spectrum, Netflix, Spotify, Prime, Hulu, Emby... the list goes on and on.
A:AnswerI discovered the same thing and there doesn't seem to be a way to allow optical output while the headphones are plugged in. It's understandable to mute the TV speakers but it's baffling why they'd have it mute the optical output too. Strange decision by Sharp.
A:AnswerHello Moving, this unit is made to be used in the USA. Unfortunately, we are unable to make a recommendation with regards to you moving the unit outside of the USA.
A:AnswerI am not sure about the Dolby vision, we never checked. Ours is always connected to WiFi, so we haven't actually had this problem.
Problem I have though is the Caller ID doesn't show when the screen is at Max, without black frames on top and sides. Our Remote won't control the whole TV, we had to hook up the remote from previous TV we had upstairs. We had to contact support to walk us through the process. So the remote that came with the TV is used basically for volume control. We haven't gone into the streaming or other channels it supports. I know this is more then you asked for, hope it helps a little.