@marc0janssen How about another Synology at a friend's house?
@marc0janssen I just saw you use a Mac, so do I ( as well as Linux but the Mac is my main system). My current setup for backup is using Acronis True Backup to do a full backup to the cloud which is encrypted. I also use Mega.nz to backup my entire Documents folder (and use the Mega app on other systems to locally sync the files I need). Then in have a Time Machine external drive.
@supernova the Mac is my main man too ;-). I have nothing on my Mac. All data is on the Synology. I use resilio to get some data local on the Mac. But the main storage is the Synology. I have my timemachine backup on this Synology too. That data is replicated to any other drive here at home and to a storage provider. The timemachine backup are not replicated. They are just setting and apps.