I recently had my Proxmox host fail, so I re-installed and recovered all my VMs from backups.
I’m noticing that my file structure (this is on my NAS where Proxmox mounts it via SMB/CIFS) has some duplicate folders in it. The ones I highlighted are all empty. Is this normal? Can these be removed safely?

Without knowing a little more, it’s tough to say what’s going on, but I suspect when you recreated the storage, you connected it to a slightly different place from last time. What’s the output of
cat /etc/pve/storage.cfg? Thedump,images,private,snippets, andtemplatedirectories are auto-created when you assign those roles to a storage pool in the PVE Datacenter.Seeing the content of
storage.cfgand maybemountwould help get this sorted, I think.