Here’s a discussion about whether to install on the host vs making a separate VM to serve the files. I don’t know if there’s a right or wrong way to do this, but since I’m running mergerfs/snapraid I figure I’d put it in a VM to keep it separate from Proxmox.

I ended up getting it to work by checking the permissions on the Samba server. The folders were owned by the right user (uid=1000) but not the right gid (gid=something else). chown’d everything to 1000:1000 and 775 permissions and now everything is functioning as expected. Thanks for the help!