You can edit the retention rules of a snapshot copy.
Before You Begin
Read about Considerations and Mapping in Snapshot Copies.
Procedure
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From the navigation pane, go to Manage > Plans.
The Plans page appears.
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From the Plan table, click the plan to add a snapshot copy to.
The plan page appears.
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In the Backup destinations section, click the snapshot copy that you want to edit.
The Edit snapshot copy dialog box appears.
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In the Retention Rules section, choose one of the following methods of retention of snapshots.
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Retention period: This is the default method of retention. Use this method if you want to specify retention based on a time period.
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Number of snap recovery points: Use this method to base retention on a number of snapshot recovery points.
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Click Save.