Question about 1TB My Passport drive

I recently purchased the drive above and have had no issues with it whatsoever apart from the fact that everytime I plug it in my computer pops up a dialogue box asking if I want to scan and repair the files or continue without scanning. I always select continue without scanning and everything functions normally but what is causing this and how can I stop it? Many thanks.

That message usually appears when you disconnect the Passport USB cable without safely ejecting it first. Check the following link for more information.

How to physically connect, disconnect, and install a WD external drive in a Windows PC or Mac