Check the reason why Synology Network Backup failed
If you have encountered errors with the Synology Network Backup and that the log message is as vague as
Network Backup failed to backup task [xxx] to [xxxx.synology.me]. ([23] Some files could not be transferred. Possible reasons: 1) backup user has no permission to access the files, 2) illegal file name. 3) file name too long)and you want to get more information about the error, simply connect to the console and open the file /var/log/rsync.error
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