length of PDF file name
Thus the name of a file or directory can be up to 255 characters. When specifying the full path under Windows, you need to prefix the path with \?\ to mark this path as an extended-length one (~32k characters).o be precise: NTFS itself does impose a maximum filename-length of several thousand characters (around 30'000 something). However, Windows imposes a 260 maximum length for the Path+Filename. The drive+folder takes up at least 3 characters, so you end up with 257.