Problem with clip PLEASE HELP

When I first bought the sansa clip, I plugged it into my laptop (mac) and it read it fine and I put songs onto my clip. But now when I plug it in the icon wont appear on my desktop so I can no longer add any songs to my clip but it still charges. I do not know how to access it through the computer now since it wont show up on the desktop and I dont know what to search for in spotlight. Please help me.

It is now no longer charging :confused:

Under settings, make sure USB is set to MSC. I’m pretty sure Macs don’t support MTP, so that won’t work if it gets set to that.