Is there any sort of check to determine that a copy of a backup successfully completed on the secondary location? IE, was the last bit of the file written?
I would say if there’s no error, and if the row is in the BackupFiles table then it completed. I capture the errors and put them in the table so you would see it as a warning in the LogDetails table for that backup. So if something is happening to your copies and it’s not being logged as an error I’d like to work with you to get that fixed.