Iomega external hard drive not being recognized

[dots77]

Hello, i'm in desperate help, my iomega external hard drive is not being recognized by my computer. I've tried restarting both, unplugging power cable, etc. nothing seems to work. please help.

 

[Paperdoc]

Is the external drive already Partitioned and Formatted? Or, do you have to run some Initialization software from a CD that came with the unit to get it ready to use? Check the manual.