Weekly Backup instead Daily Backup

Troubleshooting
2

You could use the similar part of the dietpi script in /etc/cron-daily in /etc/weekly.
Generate a file dietpi in /etc/weekly like this:

#!/bin/bash
{
        #////////////////////////////////////
        # DietPi Cron.Weekly script
        #
        #////////////////////////////////////
        #
        # Info:
        # - Location: /etc/cron.weekly/dietpi
        #
        #////////////////////////////////////

        # Assure that whiptail dialogues are skipped, even when the script is called manually, since STDOUT is redirected
        export G_INTERACTIVE=0

        #----------------------------------------------------------------
        # DietPi-Backup weekly
        /boot/dietpi/dietpi-backup 1
        #----------------------------------------------------------------
}

I am not sure whether the line export G_INTERACTIVE is needed.
@MichaIng: Can you clearify this?

The script above does not interpret the DAILY_BACKUP option of dietpi-backup.

Use dietpi-cron to set the instant of time the backup shall take place.

If you would change the script dietpi-backup, e.g. to add an option WEEKLY_BACKUP, this would be overwritten in case of DietPi updates.
This would be an extension of dietpi-backup to add such an option and suppress the daily backup at the day of the weekly backup. Additionally, a different location for the weekly backup with a different Amount option would be needed.

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