Sharepoint Librery on Comms Site

[MVC_User]

Morning.

I need some help (quite new to all this Modern SharePoint)

We are thinking about creating a comms site to host the companies Shared Library.

The idea is to use AD to manage the groups of user.

the thing that i am not able to figure out is how to compartamentalise the Library.

For example, there will be HR documents that should be visible to all employees. Operational documents, only for the Ops team, and others that will be shared by 2 departments. Will that complicate access/security groups too much?

is there a Best practice recommended?

thank you

[#2]

@MVC_User 

It depends on the size of your company. 

We create Intranets for all the company using a comms site. All the content is open to all users. 

If the files are being collaborated on rather than published content then create a site per department. 

There is no best practice for SharePoint just how other people have done it, best to design something that works for you.