PLANET NAS-7450 - Manual (Page 76)

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The GFS media rotation mechanism is the policy of managing backup versions. The policy is
described as below. Basically it will check for obsolete versions and delete them when a new
backup version is created. X, Y, Z are user-defined numbers.
a. It will keep all the backup versions today.
b. It will keep one backup version per day in the last X days, except today.
c. It will keep one backup version per week in the last Y weeks prior to the X days.
d. It will keep one backup version per month in the last Z months prior to the Y weeks.
On the NAS server which acts as the SmartSync client, set up a SmartSync task, which
defines the schedule settings and the source folder.
To set up a SmartSync task, please go to the “Backup → SmartSync →Task” menu on the
“Administration Page”. Click the “Add Task” button.