REFS partitions already exist since server 2012, however this is still not fully implemented by Treesize. For instance you cannot create snapshots on REFS disks. It only supports NTFS. Microsoft will continue to support REFS in the future (server 2025). Can support be added please?
We will investigate why creating snapshots fails for ReFS drives, I don't know any reason why that should not be possible.
Are there any other features on ReFS volumes that are not working for you, but do on NTFS drives?