Backing up local FSLogix VHDX advice

[Zoatibix]

Hello.

I've been asked to backup a new windows server that includes student's work files. I've not had to backup / restore FSLogix before and the VHDX file is 24.4TB!

The good news is that I have sufficient storage space.

The server has a NAS set as the F: drive of the server. Within that 24.4TB of the 49TB space has been turned into a VHDX file. I've created a normal Windows server backup job, which backs up the drives.

I have a couple of questions about the practicalities of this.

Firstly, as the students only just started I think I'm backing up a lot of white space. Is there a way for VEEAM to handle that? Otherwise I'm thinking it's a case of potentially downsizing that disk to something more sensible.

Secondly, if I needed to restore a few users files would I need to restore the entire VHDX file to another location?

Thirdly, is there a better way of doing this with VEEAM?

Thank you.

(Apologies if this seems hazy but I'm still trying to get some details on this setup.)