I am new to this forum and already lost

Let met explain our situation.
We are in the process of virtualizing our physical server park. We use VMware ESXi5.1 as the hypervisor running on three hosts.
We used to use Netvault Backup. This is a good product with many options. And although we can keep using this software there are better ways now with VMWARE.
One of the better ways is Veaam Backup.
Now here is my problem.
I have a fileserver, a windows 2012 Datacenter server, with a spanned volume of 6TB. (3x2TB VMDK) I have read that Veaam backpup & Recovery 6.5 does support GPT disks and Dynamic disks as well as spanned volumes. But I cannot seem to get the FLR running. Which I have also read that it should work.
Am I mistaken here or am I doing something wrong?
Then I would like to know if it is possible to just add a NFS repository to Veaam. I find it confusing to use a share on a different machine for the backup repository. Why not a direct NFS connection?
Maybe there is a different /better approche to use for backupping a 6TB fileserver ?
Any info is welcome.
If more info is needed please ask.
Kind regards,
Ronald