I tried to remove a song, and now it is frozen.

Try Googling "Lyrics, Let It Go/Frozen." Not sure if they are even produced. Worth a shot! Good luck!!!

One or more songs have a problem with their ID tags. Back up your songs before continuing. Remove all songs and it will should be back to normal. Add songs individually to find the bad song or songs and avoid that one.

let the battery die. hook it up via usb and reflash it using sansa firmware updater. it will erase everyting but at least it will start working again.

while it is off slide down the power thing while holding play and resseting it with a safety pin, paperclip, staple, etc., this should bring you to the zen format screen thing, select "clean up" this should fix the problem and still save all of your files, if this doesn't work try the other options from the zen format screen.

Press and hold the 'user' button with the play/on/off button. This should reset the player.

mine did that .. I had to replace it. you can try to le the power run out and recharge ...

Try removing the batteries to force it to shut down. Wait about 30 seconds, then put the battery back in. This will force the Sansa to restart, after which it should work.

Did you figure it out? I have the same message on mine and nothing I do fixes it... my laptop won't even recognize the usb device so I can't look into reformatting the player.... if you figure it out let me know.

Try a hard reset press and hold vol + and center select button for 20 seconds. Best of Luck.

my Sansa M200 has a frozen screen, tried removing battery but comes back screen frozen