How can I verify data loss on an external hard drive?

I accidentally removed my external usb drive without ejecting.
The next time I connected the drive Windows 10 prompted a scan to fix errors.
They were fixed after the scan and the hard drive connects fine but this drive is loaded with pictures and music.

What exactly did Windows fix and is there a way to find out if a file was lost?

Hi,

You could refer to the following link: https://support-en.wd.com/app/answers/detail/a_id/16458