Aid4Mail 5 can access and create files with long names that exceed the default 256 character limit set by Windows. However, this is not the case of all programs. If such files cause errors when you try to access them in other apps, Windows 10 lets you fix this through a new registry setting. Read the following article for step-by-step instructions:
https://www.howtogeek.com/266621/how-to-make-windows-10-accept-file-paths-over-260-characters/