You can link to any url you want, including file shares, as long as it is presented as a proper url, not a "share".
I suspect what you've seen about it not being possible is the cases where people are trying to link to a file on the Confluence server and expecting c:\data\myfile to work - not understanding that their browser sees that as a path to files on the client machine.
You need the URI of the share. For example, let's say you have the following situation:
The URI you need to link to is \\mycomputer\shared\file.txt
If your users are not connected to your corporate network then you'll need to share a file from a public-facing service like Dropbox, OneDrive or Google Drive. Those services will provide a URL that anyone can click on and access.
Hi Community! I’m Elaine, Confluence Product Manager. You may have read my earlier post about page tree in space navigation sidebar. I'm excited to share another improvement that helps you organize ...
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