Iomega 320 external hard drive computer wont recognise

Probably not the right answer for your problem. Mine is an external 1 TB Simple Drive. Mine wouldn't respond at all. I unplugged the power cable from the back of the hard drive and replugged it in and instantly it worked (with the computer and hard drive plugged in). I had tried rebooting the computer, plugging/unplugging over and over into the computer and that didn't work.