My local drive (Macintosh HD) runs out of space so I want to setup an external drive (External HD) with the same /Users directory and associated ACL as on the Macintosh HD drive and offload some of the more data-heavy directories there (Photos, Music, Movies).
I've tried to use the [+] button (after authorising with admin privileges), but it didn't seem to allow me to add 'special' users. How do set 'system' to have R&W access, for instance?
Before making such a fundamental change, I wanted to see if I should use
sudo chown -R system:system system to this directory. Though this would only change the owner and not necessarily let other users also have access to it. AFAIK, users 'system' and 'admin' are in different groups too.