Is there any best practices when implementing these two into work?

Currently we have it setup as a SMB share folders and Veeam is sending backups to it.
I did a little bit of research and saw that people are using ISCSI and connecting Synology drive to Windows Server and using it like that. As I can see they are using ReFS File System.

What would be the best optimization when we have Veeam + Synology in our Environment.
Veeam B&R and our main Synology are located in the same location within same subnet.

After that main Backup is done we have a Backup Copy Job trough IPSec to our Branch Office where we also have Synology NAS with SMB share.


With ISCSI I saw that people are using FastClone and I’m not familiar with it at all. What is the use of it?


Any advices are welcomed