kimberlyinmn, you have really set my mind at ease! It sounds like the most I have to worry about is losing my text messages and some game data, unless I do something stupid. Unless there's a way to preserve my text messages and the progress I've made in my games? Does anyone know?
I think I might factory-reset before I root, so that I can then immediately make a backup of the pristine system before anything gets changed. That way, at whatever point in the unknowable future I might want to get a different phone and return this one to Virgin, it'll be all *ahem* virginal. :angel: Unless the Kies thing you mentioned restores the right stock? It's running Ice Cream Sandwich right now, and I have no idea when or if it'll ever update on its own.
The app I had tried to use is "AppMgr III (App 2 SD)" but I just looked up Link2SD and I think I see why that's being recommended.
Thanks for the replies. They're definitely helping me decide what I want to do. I've never had a smart phone before and I'm not much of a techie, so wading out into advanced waters makes me a little nervous!
[Edited to add] There are certain things I was able to move to my SD card already. The camera detected the card and now saves pictures there by default, and I was able to go into My Files, long-press on certain things and select Move. Will I simply need to remove my SD card before doing any under-the-hood work, will I need to re-locate some of those files and folders back to my phone first, anything like that? I'm going to need some hand-holding here, I think! Thank you.