Postfix
Inserted before the last dot in stored names when link format includes the file name.
Postfix
Inserted before the last dot in stored names when Download link format is the with-filename option (link_format = 2).
Where to find it
Admin → Settings → Files → Downloads → Postfix
Setting key: add_filename_postfix
Allowed characters: letters, digits, _, -.
Example: _my-brand → movie_my-brand.mp4
How it works
Applied on upload paths when the filename format is active. The admin field is often read-only while format is short-id only (5).
Common problems
Postfix missing in URLs
Link format is short-id only — switch to with-filename format first.