Hi @aqua-calc !

Are you on XOA or XO from sources ?

@aqua-calc

I can confirm that a Synology works well as a backup "Remote" but as @olivierlambert said more details are needed to help.

@Matteo
You can use a SAN shared storage that is thin provisioned such as NFS.

@DustinB said in Delta backup questions:

As a discrete backup that is saved to each location individually.

Yes, that is a more accurate statement.

Also, there is an option for doing Mirrored Backups:
https://xen-orchestra.com/docs/mirror_backup.html#mirror-backups

@Lulina

The VM created for the health check is deleted after boot confirmation is achieved by seeing the Xen tools.

@Matteo

If the storage type you have the VM is thick provisioned it will take up more space. Use a thin provisioned storage for better storage efficiency
https://xcp-ng.org/docs/storage.html#storage-types

If you choose 2 storage destinations it will copy to each of them at the same time.

@abudef
I only did that in my video to make it easier to show how things work with XCP-ng hosts, I don't think the VM's would work inside the nested systems.

@jdias14 Make sure you have at least double the available disk storage space on the target.