[acjohnson55]

Sure, they could. Most people don't post tons of hi res photos. But I'm sure there are ways you could optimize to not have all the content on local device, if it's such a big deal. But this is a really strange point to me to be hung up on.

[MattRix]

I think you’d be surprised at the number of photos posted, but also many people post tons of gifs (especially reaction gifs) which are fairly large.