You can back up NAS file server data with a full, incremental, or differential backup.
Procedure
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From the navigation pane, go to Protect > File Servers.
The File servers page appears.
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In the row for the NAS file server that you want to back up, click the action button , and then select Back up.
The Select backup level dialog box appears.
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Under Backup level, select the type of backup to perform.
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Click OK.