I am a new 8100 owner. Before I 'knew' it couldn't be done, I bought a 4GB SanDisk card, since I wanted to use it for mp3's, and I have a lot of them. I went through the usual stuff, and found out that it worked fine! I can play my mp3's through the onboard speakers (which suck), and now am trying to get an adaptor and/or dongle to be able to use headphones (and in particular, the Motorola S9 unit I bought) to hear my music.
So to me, it's ludicrous to hear someone say it can't be done, since I'm doing it! My 8100 tells me I have actually 3.7GB available (that was before I loaded some photos and about 1GB of music).
So bottom line: it can be done; I've done it; I'm doing it, and no one can tell me it cannot be done.
There's a lesson there. Don't believe what everyone says until you know for yourself. And I just LOVE people who say, "Nah, it isn't possible!"
Oh yeah??
![Smile](http://www.blackberryforums.com/images/smilies/icon_smile.gif)
Don't tell my Blackberry that!
ALSO: I should mention I use AT&T as my carrier. 4GB IS doable, and maybe 8 or even 16, who knows?