It seems that you might be a bit worry. But as for any storage devices, it could go bad at any time. So be sure you have backup elsewhere.
You have something more specific in mind?
Half a year ago I bought the 8 gb version of Creative's X-fi 2.
I bought it because I needed more space for my music (before that I had a 4 gb mp3-player. But after a half year I my mp3-player is again nearly full. So I'm now thinking about buying a micro-sd card. But before I buy it, I want to now if it works well in the x-fi 2.
I've googled up some reviews, but nowhere I could find a more detailed description of how good micro sd card work in the x-fi 2.
So I was wondering, how are your experiences with micro-sd cards in the x-fi 2?
Thanks in advance, Loth91