Changing Backup Retention
Modifying Backup Retention in BackupPC is fairly simple.
Go to Edit Config → Schedule
Here you will be able to change the settings for the categories below.
If you have doubts about a specific item you can click on it in your BackupPC Web GUI and it will direct you to the official BackupPC documentation.
These backups contain every file in the server paths defined for backup.
These are partial backups that only contain files that have been modified relative to the last full backup.
Blackout periods are when BackupPC is instructed not to perform any backup operations.