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.
Surface Pro (2017) vs Surface Pro 4
Where HTML5 is headed next
MacBook Pro v Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.