mbtrhcs wasn’t saying that you specifically don’t have a big enough hard drive, they’re saying that MS Flight Simulator is simply too big of a game to completely store on a player’s computer.
MS Flight Simulator has a fairly accurate 3D model of the entire earth. Like, the whole thing. So it’s constantly downloading the parts that the player is currently in, and deleting the parts that they are not in.
I hope there is a manual download function for your favorite areas to play them offline, that do not get deleted over time. Kind of how maps on your phone work, just with lot more requirements.
There is. It’s called manual cache and it does exactly this:
https://i.imgur.com/MNmLqcb.jpeg
You can use as much storage space as you have available. There is no upper limit, as far as I know.