File system

A local file system path where public files will be stored. This directory must exist and be writable by Drupal. This directory must be relative to the Drupal installation directory and be accessible over the web.
An existing local file system path for storing private files. It should be writable by Drupal and not accessible over the web. See the online handbook for more information about securing private files.
A local file system path where temporary files will be stored. This directory should not be accessible over the web.
This setting is used as the preferred download method. The use of public files is more efficient, but does not provide any access control.
Enable to convert file names to US-ASCII character set for cross-platform compatibility.
Enable to also convert the file name that is displayed within the site (for example, in link text).
This is a recommended setting to prevent issues with case-insensitive file systems. It has no effect if transliteration has been disabled.