Make "Save Pictures" option clear

[jidanni]

First, these days "External Storage / Internal storage" might not mean much, and be confusing.

Second, I have adjusted the text to what I am guessing you folks originally meant. (Not tested!)

[sivaraam]

Thanks for fixing the setting! I've long wanted to do this myself :)
I've left a few minor comments. Other than that this looks good.

[sivaraam]

I've added code suggestions that can be easily used to apply the suggested changes.

PS: Forgive the force-push in between, I accidentally applied suggestions myself rather than allowing you to apply them.

[sivaraam]

Thanks for the PR @jidanni !