Permission Confusion?

So I now have 3 drives, my origina internal and a backup drive (the Crucial) and a USB Flash Drive (Backups). When trying to do the disk speed test, it complained I could only read the Crucial drive. I changed that to give me read/write. There ne er seems to have been a complaint from CCC backup up to it.

While doing this I see some stuff that I find confusing. Looking at the 2 external drives, I see the Crucial having a “wheel” & “system” designation, while the other has a “staff” designation. And MORE confusing, it says my internal drive I can only read on. I tried to add me in to my internal drive and it won’t let me.

Can someone shine some light on this because it is confusing me!

The permission you are showing are for the top level of the drive. How you created them determines the initial permissions.

You did not need to add yourself to the Crucial’s top level permissions - you could, using Finder, have created new folders and entering your admin user and password when asked. Alternatively you can (I usually don’t) disable all permissions on the drive, by using the padlock and ticking the “Ignore ownership” box below the permissions.

The system disk has additional protections. You can’t modify top level permissions and you can’t add folders at the top level. But you can add folders elsewhere. Most often in your home folder or the /Users/Shared folder.

Not sure if you wiped the Crucial Drive right after you bought it and re-set it to APFS or not but you can use BatchMod (http://www.lagentesoft.com/) to reset permissions very easily. Of course the way you are doing it with Option I is usually also easy.
Just a hint. Patrick

Yes, soon as I got that Crucial drive I formatted it for APFS.