New
#21
Sorry for leading the OP down a useless path.
To be honest, I've not really been paying too much attention to that checkbox on folders (directories) for years. Maybe because that read-only attribute has been available for folders since the early DOS days, but I had never been able to observe any effective use for it. It had no effect on anything I could find except for displaying the fact that it was either marked as such or not: with read-only applied to the folder, you could do anything you wanted to do with the folder itself and the files it contained. IOW, delete folder, rename folder, add, delete, read, write, and execute files within, add/delete/rename subfolders.
I searched a bunch of drives, internal and ones that have been in other machines, and lo and behold, I see the same thing as the OP. So I too, went on a search, and found tons of articles/forums discussing this issue going back to 2002 or something. And although there were a few mentioning that it could cause problems, most were saying it was a non-issue.
I don't recall ever running across a problem that could be traced to this. I wonder if the OP, or anyone else here, has encountered any issues.