External hard drive

My external hard drive has a clicking sound and I'm unable to gain access to it because my computer no longer recognizes the drive. What should I do?
Thea Wiggins

I just worked through this same issue with LaCie tech support and they fixed it- it was a bad power supply. Fortunately I had another LaCie drive and when I plugged the power supply from that one in to the "misbehaving" drive, everything booted up fine.