The Read Only for a folder doesn't work. You can make items in the folder read only but not the folder.
This has been discussed at length many times and I'll pause here.
In earlier Windows versions I could click on the read only box and make files and folders read only. I can still set the read only flag for a file. After that I cannot change the file, but I can delete it. So it is not really read only. It also does not work with making changes to the folder such as creating new files and such.
When I have a folder with over 100 files that I want to protect just from casual change or deletion, I have not found a way to do it for the folder. Doing it for individual files is too tedious even if if really worked (see above). I know there is a way if one has the explicit and esoteric knowledge of the "security" settings. That is where I cannot do it regardless of the dozens of Internet sites with procedures detailing how to do it. There is always something different between the instructions and what I have. I think that Microsoft really "stepped in it" with all this. It is supposed to work, but who can make it work? I would be willing to rely on the "read only" box for a file or a folder using administrating privileges. But no, they had to make it super safe to the extent that nobody but a Microsoft software debugger can follow it. Is there a way to make a folder and its contents read only? I share my files with family members on several computers using Dropbox. They should see some of these folders such as pictures, but I don't want accidental deletion or changes to these originals.

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