How to set the retention settings

I have a lot of data in the retention area. How can I remove please

The amount of data in this area and how long it is retained are set in the Retention Policy in your device’s software or the Reseller portal.

Local Server installation

The retention area consists of files you have deleted from your device and your previous full backups that have been replaced by recent full backup(s).

Since the last full backup, daily changes to your data and files have not been stored in the retention area. These changes are necessary to recover your last full backup and cannot be purged within the existing live backup.

General rules

If your retention policy setting is set to seven days, and you delete a file from your server, this file will be purged from our system on the eighth day.