Hi there, I'm Tim and will be assisting you today. I have over 15 Years as an Engineer and have been with eBay, DoD and many others. I will do my VERY BEST to help you. If you like i can offer remote access and a call. In addition, with any positive rating I will support your question going forward for free.
Larry, if the drive is not being recognized by multiple devices, it's almost surely dead. There are no tools to run on it unless it was being mounted. There are a few other places we could, or I could look for you, but i doubt its going to show up. This is probably a loss, or if there is really important stuff on it, you could send it to a data recovery shop, will run you 1-2k to have them try and recover it.