Freeze/Cant turn off my m3

I just bought m3 today, uploaded few mp3s and lol! after disconnected it from usb it says that my m3 is still connected to the usb port. I cant turn off m3 (im holding play/pause button) or reset (is it possible to do it?). I connected it again to the usb but now I can't see it in "My Computer" as a flash disc.

Welcome to the Meizume forums Wuem. I do not own an M3, so I'm a bit unsure as to how to reset it. I believe you hold down the enter button for 30 seconds, and it resets. if not, try holding the play button for 30 seconds. Also try just letting the battery die, that will manually reset the player. Also try just letting the battery die on the player, as that will reset the player. Sorry if this wasn't much help, I'm sure that someone who has a M3 would be able to help.