For a month or two now I've been using simple file sharing, for several months before that I didn't, then before that I had simple file sharing tuned on. So at the moment I don't have a security tab (on files or folders) or sharing permissions settings there too.
As an example, from another machine, I can access files from 2007 but not from the summer of last year in the same folder.
I can access all files on that local machine.
So I think I just need to re-apply security or permissions somehow? What should I do?