I'm a startup founder. How do I setup a shared network drive on my LAN using my current shared (website) hosting plan?

Hi,

I want to set up a shared network drive so that all my employees that can access shared company documents directly. They all are connected to the same internet connection (we have a dedicated 1:1 lease line connection). Also, we currently have a shared hosting plan with a total space/bandwidth that is higher than our current consumption so was wondering how to use those servers to store the files on this shared drive.

Thanks!