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External Backup

Here you can choose to backup data from USB or eSATA external hard disks to your NAS or backup data from your NAS to these external hard disks. In addition to supporting two-way backup, this feature also supports scheduled backups, making sure that your data is always backed up.

Mission Mode: ASUSTOR's Mission Mode option for external backup allows you to configure the time period under which your backup job will be active, after which it will be aborted if not started. Mission Mode gives IT administrators a significant amount of flexibility when configuring backup jobs and network resources.


Archive mode (incremental backup): After enabling this feature, successive backup jobs (after your first backup job) will only copy the data that has changed since your last backup job (block level). For example, if you have made some small changes to a 10 MB file, incremental backup will only copy the portions that you have made changes to. This can significantly reduce bandwidth usage.


Support sparse files replication: You will only need to enable this option when the data that you wish to back up contains sparse files. Normally, you will not have to enable this option.

Supports symbolic link replication:

You will only need to enable this option when the data that you wish to back up contains symbolic link files. Normally, you will not have to enable this option.

A symbolic link (also symlink or soft link) is a term for any file that contains a reference to another file or directory in the form of an absolute or relative path and that affects pathname resolution.