Iomega Minimax Iomega Minimax 500GB External Hard Drive - Clicking Noise And Won't Mount On Desktop For Mac OSX!?

Iomega Minimax 500GB External Hard Drive - Clicking Noise and Won't Mount on Desktop for Mac OSX!? - iomega minimax

I have an external Iomega MiniMax 500GB hard drive, and I joined today and not mount it on the desktop. I'm on a MacBook with OSX, and I've never had a problem. I tried to connect via FireWire or USB connection, but my computer does not recognize. My concern is that most of the Iomega is a very small crack at this very moment I saved all the documents, photos, videos and music files that I have for something I have not surely afford to reformat back if I can find a way to backup or save files. Please let me know if you can help in any way, or if you know what backup files can not lose. I literally everything to save the contents of this drive, so please let me know what to do. Thank you very much!