I have not tried to put 6gb on it. And maybe I'm going to have trouble with it in the future. My thought is that I have a 6gb SDHC, so whenever they figure this out (find a fix). I'll be ready. The way i'm working with mine is I have it formatted to fat32 and the BB sees 5.6gb. The problem is when you connect your BB to the computer it doesn't recognize the card. When you run media manager, it's doesn't see the card either. But if you take the card out, put it into a card reader, connect to your computer, then you can drag files into the folders. Pop that bad boy back into your BB and you can play the files with your BB media player. I've read different things about what's causing the problem. I'm not getting into that now, but hopefully one day it will all work right.