Best way to have file sync on a local network?

So I have a NUC with Proxmox as the primary OS and OPNsense in a VM for my home network. I've been trying to move away from Google services but would still like to use them as a back up solution. Would it make sense to use Nextcloud in a VM as a replacement and use Rclone to encrypt and backup my files to Google Drive? Or should I use a NAS OS like Open Media Vault instead?

I'll also mention that I have an empty SSD that I can passthrough and that my primary draw to Nextcloud is that they have a Windows desktop syncing app like Google Drive does which makes things familiar and convenient. I don't plan on having my Nextcloud instance exposed to the web but might setup a Wireguard tunnel into the local network in the future.