There are 8 characters which filename can obtain
255+3 in long file file name systems, that's 255 plus the 3 character file extension. It's 8+3 in DOS or older file systems.
windows files can have up to 256 characters. they can be letters, numbers, nad spaces. no symbols. they can be in uppercase or lowercase
The maximum length of a directory name or file name is affected by the location itself. The maximum length of the path to a file on a modern Operating System is 255 characters.
255 Characters in a file name.
8 characters a decimal the 3 letters for extension. 8.3