Copy errors from K41 drive

I have a 8TB Samsung drive on my K41 that stores all my music files. On my network I have a Synology NAS. I use USB Copy on the Synology to copy files from the K41 to a USB back-up disk.
Since some time I started getting errors on this taks and it fails. (Source file does not exist or is unreadable).
Is there any way I can do an integrity check on the K41 drive? From what I found this can not be done from the network.

If you aren’t getting errors in playback of those files that are failing to copy, it’s unlikely to be an SSD issue.
Have you tried using a computer rather than the NAS to back up?
At present Antipodes has no disc integrity check available to users, this can be done via support session and remote access by the team running Linux commands.

The issue is that the program does not tell me which file has the issue. I am using USB Copy on a Synology NAS. I will try to perform a manual backup and see what happens. Thanks