This Keyword returns a <string>, the path of application specific folder on the external Storage, normally the SDCard. Some platforms don't support this, so they return the same as SDFOLDER added with the name of the project.
The returned value doesn’t end with a "\".
On Desktop Win32 it returns the same as SDFOLDER+PRJ_NAME.
On Windows Mobile it returns the same as SDFOLDER+PRJ_NAME.
On Windows CE it is not supported and it returns an empty string.
On Windows 10 it returns the application specific folder in the Downloads folder.
On Android it returns the folder on External Storage folder path private to the application.
On iOS it returns the application documents folder that is shared, visible in iTunes and Files App
