Vagrant synced folder from Linux host (libvirt) to Windows guest without using rsync?

I’ve spent hours on this and found a lot of outdated, unmaintained or abandoned plugins from sshfs, smb, better-smb, nfsd and many others. I’ve read blog posts, GitHub issues, most of which are 6, 7 or 8 years old, and I am no further forward.

I want to share a folder that has 12 GB of files in it, from a Linux host, running libvirt, to a Windows guest. Because it’s so large, rsync is not an option.

Has anybody accomplished this seemingly impossible task and can share any wisdom?