I had exactly the same problem with my drive and unfortunately i could not fix the problem. I had to replace the external drive.
I would suggest contacting the hardware manufacturer to see if there is anything they could do to help.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone