make sure to right mouse click and eject before just unplugging the usb cord. i corrupted my micro sd by doing this over and over. i had to put the sd into a digi cam and format it before win7, win xp, or the evo could see it. luckily i had my sd backed-up to my laptop hard drive.
2 lessons learned
1) safely remove the evo
2) backup my sd
2 lessons learned
1) safely remove the evo
2) backup my sd