Syncovery - Delete folders / files before backing up

[Meza100]

Hi guys,

I use the newest version of syncovery. One of my backup profile has the target on a webdav-target (on my own nextcloud server). I only want to make one backup per month. Now I ask you, if you have any idea:

I want to delete all folders and files of the target-webdav-directory, before syncovery would start the backup (to save the diskspace of my nextcloud-instance). I searched a possibility, but I don't found one. Have anyone an idea?

Thanks and kind regards,
Stefan