New
#21
You have done well so far.
Now download Minitools Partition Wizard Home Edition referenced by ICit2lol in post #2. Install and run it. Post a screenshot. If your problem drive shows up a bad disk, the prognosis is indeed bad.
You may also answer the following queries.
1. How long have you been using that external HDD?
2. Is it still under warranty? Can you RMA it and get a replacement?
3. Since you were ready to format it, I presume you have no data to be recovered. Confirm.
( Right now I am slightly indisposed and so may not respond immediately.)