Open and/or download a file from a server location to the client computer (C#, Blazor Server App)

Question

I have a file located inside a folder on my server: F:\Data\Attachments\a.pdf.

I'm using Blazor server app with asp.net 5.0 and C#. Up to now, the user that uses the application can upload this file. This file is correctly saved inside my server folder.

I can open the file with the powershell on my computer on which the Blazor Server App is running thanks to \\ip_server\Data\Attachments\a.pdf and I checked the permissions of the folder on the server.

I want to create a button that consent to download the file on the client machine (so, notify the browser and open the save dialog to choose the destination) or something similar because I tried everything without success.

I also tried to open the file using a link <a href="file:////ip_server/Data/Attachments/a.pdf" >link</a>.

When my file was located inside the project folder, I had no problem. So, how can I solve this issue? Is there something that I'm missing?

If you need any other information, please ask.

Thanks in advance.