Hello.
I have nextcloud file access control flow installed. Right now, I am trying to block any file that its name contains 16 or more numbers. However, when I use this expression /[0-9]{16}/ It blocks files that have more than 16 digits. Can you please tell me what I have wrong since I am new to this service.
Regular expressions are not Nextcloud specific and are used by many other commands. Aunt G. can show you many examples how tobuild and use them 
To block 16 or more digits in a row, I would use this regular expression: “/[0-9]{16,}/”