I have Kingston 1 GB microSD card full of MP3 songs, pictures and videos which I was using with my mobile. I have another 256 MB Nokia microSD card which was also used with my mobile. The Nokia card when inserted into the Fuze creates no problem, and I can access its contents. However on inserting the 1 GB Kingston Card, my Sansa Fuze hangs. I tried switching off the player before inserting the card, then I insert the card and switch on the player, after which it hangs at the Sansa logo screen.