File and folder naming is something I struggle with continually. Eastern languages are a particular challenge. Unfortunately, file naming rules are different for each operating system, as well as for HTTP. What works on your machine, might not work as a URL.
So I do my best.
Whatever you upload or add remotely to the File List’s folder will be automatically renamed as follows:
Dots are not allowed in the file or folder name and will be replaced with underscores.
date.name.txt will become date_name.txt
Spaces are bad trouble in URLs, so:
My picture of my dog.jpg will become My-picture-of-my-dog.jpg
Spaces can be preserved for display. Go to File List > Settings Tab > Display Settings and check the “Preserve Spaces” box. The file name will still have dashes in place of spaces, but they are replaced-back with spaces only for the display.
You can also hide the extension, if that part scares your users…
My picture of my dog
These special characters are OK. Anything else could be troublesome.
$ - _ . + ! * ' ( ) ,
If the file name sanitizing function has too much trouble cleaning your file name, it may simply be named unnamed-file.ext. You can rename this to something more suitable in the Admin File List.
Sadly, the rules for naming our files and folder are much more restrictive on the Internet than they are for our personal computers. I try to do my best to make links work while respecting the source name, and I will continue to do so.