I have setup my backup to goto the Amazon S3 service using the inbulit support in Virtualmin GPL
It all seems to work just fine, though I did have a little faf with the folder name string, still it seems to be working well.
I just have one problem/question, I selected "Reduced redundancy" and the main backup file (the tar.gz file) for each domain is indeed set that way but the other files are not.
Is this intentional or is it an error? It's not like these files are big so it will make very little difference to what I am paying for the S3 service but it seemed strange.