The only way I can think of is to plug it in then go to Admin Tools/Computer Management/Disc Management, and look for healthy. I am not sure this will answer your question. I don't know if you can run scandisk on an exterior drive. I will google.
Hands-on: Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
Samsung's beautifully designed Galaxy S8 makes for better VR experiences too
47 iPhone camera tips to help you take better photos
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.