I have been considering getting my first smartphone and would like to test the video and audio playback of the X, Fascinate and Incredible in the store. One of the main purposes I plan to use it for (other than it actually being a phone) is watching recorded tv shows on the train going to work. I am leaning towards the X because of screen size and reception quality but have read that the audio quality appears to be much better on the Fascinate I currently have a microSD card but since I have never owned an Android device, I am not sure of the formatting or files/folder structure. 1. What is the format type and does is have to be formatted from a phone only or can it be done by a windows machine? 2. Is there a standard folder structure for all the android devices I'm interested in? Would placing the test video file in something like **\**\Videos or a .mp3 file in **\**\Audio work on all the phones or does each company have their own folder structure? 3. Would the store even allow me to bring in my own card and test this out? Thanks for the help.