If this is something you must have, we suggest setting up a Site-to-Site connection between our server with a dedicated IP address and your router/firewall device in the office/site.
Alternatively, Cloud LAN feature allows you to create a local network between all the devices connected to the same NordLayer private gateway, which enables you to access windows shared drives without much hassle.
Note: In case you have any questions or issues, press 'Chat with support' at the bottom of the page.