OneDrive permissions sharing (again)

hi

I have a folder in OneDrive I share with a wider team.

I'm looking to find the simplest way set up permissions only once and only once at the folder level, and be able to share files within without creating any other sets of rules.

And: when sharing, can I use the folder

I thought (very simply) that file permissions = folder permissions cascaded down.

If I click on the shared icon for the folder I have created, and then "Advanced" under the shared Manage Access panel that opens on the right it takes me to the permission page.
I seem to have ended with multiple rules, and I can't always work out if it refers to a file or the folder itself.

I can see a list of users I've given permission, but another list of the same names with different permissions under a section heading:

"Users who have permission through a sharing link (manage links to remove users):"
I can't understand but a person can appear here with "Read Only" but also in the main list with "Edit" as well.

I think this is because I have sent links to files - although I thought that would be the folder level permissions.


Thanks
James