The same rule applies for multiple periods (i.e.
Do not use periods to separate different elements of a file name, use a dash (-) or an underscore (_) instead. Periods (.) should only be used to separate the file name from the file extension. A common example is how the modern Mac OS (9 and after) support a number of special characters (/ \ : * ? |) that are not supported by Windows. Also: Never Use Emojis in file names! It's a very bad idea at this time. Not all operating systems and programs support the same characters.This means that the character is used in a very specififc way by the operating system and using it in a file name will cause errors. Special characters and punctuation marks are often reserved characters for computer operating systems.There are two reasons to avoid special characters, punctuation marks, and symbols in filenames: Just because you can use something doesn't mean you should.