OS 10.7.5 the external drive has been working perfectly for a number of years then I accidentally unplugged it now I cannot see it at all. The light is on with a steady slow flash. I guess the drive has been corrupted do I need to reformat if so how can I mount the drive?
I think the solution will be just to format it. However, if you have important data on the drive I recommend you try to recover it first since formatting deletes everything.