OS 5 and local non-public shares

Been trying to search, but my Google-fu has been failing me. I’m currently on OS 3 with my EX2 Ultra and don’t have it configured to be accessible from the cloud, it’s only used for LAN share access among the various devices in my house. Can anyone confirm if you can keep non-user specific/non-public shares (like Data, Movies, Pictures, etc) that can still be shared locally on a LAN with SMB shares and give multiple users access to it? Would I just have to set all the shares up to be accessible to my own cloud account and then map things using that on all my devices? I’m concerned with the recent vulnerabilities in OS 3 but I don’t want to upgrade and lose the ability to effectively access and share my data among my family. At one point when OS 5 was first released, I thought that they had taken that ability away completely, but I can’t seem to find anything to confirm/deny that now.

Based on the lack of responses, I think I may have to start researching switching to a Synology NAS, which is too bad because overall I’ve been happy with my MyBook Live and subsequent EX2 Ultra. Seems a waste to have to pitch them, but they’re really not much good to me if I can’t do shared drive mappings with multiple people.

Hmmm. . . I would have thought someone would have had some sort of pithy response. . . .but since no other takers. . .

. . . .fundamentally, WD does not appear to understand that people want to manage things on something more granular than the share level. All privileges , and granting of share access, is done from the share level.

. . .which is absurd. Does that mean for each user, I would have to have separate shares if some data had cloud access and some did not?

If there was a chunk of data that I wanted to grant individual permissions for, I have to create a SHARE for that data? (rather than say, a single directory under particular share I want to grant permissions; while keeping the rest of the share secure)

Definitely a shortcoming in the feature set.