@Gertjan Thanks very much for the ideas & sorry for the late reply...family went on a surprise vacay. So yes the windows firewall was blocking it but blocking before the "Private or Public" pop up. I only mention in case someone else stumbles upon this thread and needs clarification. The Nic was set to "Private". To resolve I had to go into the windows firewall rules and add an inbound rule. Under "Scope", "Remote IP Addresses" I added my vpn range. I can now ping & access the file shares - the security pop up box does in fact now pop up asking for the credentials.
The WDMybook has a static IP BUT set within the configuration of the WDMybook GUI. It is within PFSense's dynamic IP range so I will change to WDMybook to dynamic (within the WDMybook Settings) and then set a static ip address for it within PFSense.
I do have wireguard set to use the dns ip of pfsense.
As for the remaining ip's. One device is a debian box that will also need it's firewall rules adjusted if I want access to it. The others are Amazon devices and they (Amazon) seem to block VPN's. I think it's a blanket thing to prevent ppl trying to access content outside of their global region but seems to also block incoming connections. Not a big deal as I don't need access to the echo dot's from outside.
Thanks for the help. Glad it's working