I can't get into my menu to change it from MTP to MSC...Help!

I found out I was able to delete files I couldn’t find the folders for under My computer, so I went under setting and change the USB to MSC to delete music I couldn’t find in My Computer.  After I deleted the music I went back under setting and changed it back to automatted…something… After I did that I turned off my device and now I turned it on and It’s says No files…It’s too full… so I went in and formatted my M230 unplugged the USB cord and now it just sit there and says “Please, wait.  Disk format.” it’s been saying that for over an hour now.  I can’t get into menu or anything.  I’m screwed…What should I do!!!