|If you have not done so yet, try a new or at least a different USB cord set in case it is only the cord that is bad. |
If the drive is going, take whatever steps you can to save your data if the drive becomes accessible at any time again.
Sometimes the drive within the external hard drive is good but the external case may be having the issues. In this case taking the drive out of the case and either plugging it into a new case or directly into a SATA port of a desktop computer will make it accessible. If you cannot do this, you might get some assistance from a local computer shop for a fee. Remember that this will only help if the drive itself is not bad but the case is.
Replace the drive.
Please note that any data (including pictures) that you would regret losing needs to be on more than one drive and if it is really important, more than two drives. An external drive should be used as a back up for a computer or laptop and as a means of carrying with you a copy of files when you do not need the computer itself. If the external drive is used as the main storage destination for files for a small portable computer, then you need to copy those files also to a larger or desktop computer or get a second external drive to back up the first. Keep both of them current. If a third copy is needed for critical files then making DVD's and storing them in a safe location, a fireproof vault, a second location, or a bank vault, is then advisable.
You have to be a little bit crazy to keep you from going insane.