So, I got a 2GB Sansa microsd for my new E250. I had it in mind to put most of my MP3s on the microsd card to save room for videos in the main memory, since I read that videos and pictures will run only out of the main memory. The problem is that with a sd card present, on bootup the E250 must do a "Refresh Database" of the sd card I presume. With 1.6GB of MP3s on the sd card this refresh takes upward of 1 minute to perform. That is an extremely long boot up. This doesn't happen if the MP3s are in the main memory. A bit disappointing, but I can't get large videos to work anyway, even after taking everyone's advice in the E250 video thread. Anyway, those are my thoughts.