How to open files from a backup in MacOS?

Question

macOS

Hello, I've run into the following problem. I had to uninstall the Big Sur beta and revert to Catalina. To do this, I copied the files I needed to an external screw, installed Catalina and copied them back. Due to the fact that I incorrectly unmounted Time Machine, I had to manually copy the files. The problem is that the files are opened, but I cannot change them or add a new file.

If I do ls -alh then I see:

drwxr-xr-x   2 myuser  staff    64B Aug 31 14:23 newly created_folder
[email protected]  3 myuser  staff    96B Aug 31 14:14 Old Backup folder

That is the difference in @ which according to the documentation is a link somewhere. The question is, how can I get rid of this, given that I have all the files copied from the backup look like this. Just chmod 777 (for a test) didn't help.

Answer 1

The answer was simple:
chmod -RN /path/to/directory- for directories.
xattr -rc /path/to/directory- removal of attributes for files.