Sanitize filenames
Replace characters outside a-z A-Z 0-9 . - with underscores on upload and rename.
Sanitize filenames
When on, characters outside a-zA-Z0-9.- are replaced with underscores on upload and rename.
Where to find it
Admin → Settings → Files → Uploads → Sanitize filenames
Setting key: toggle.efs (defaults off)
How it works
Reduces exotic Unicode / spaces / punctuation breaking storage paths or tools. Filenames may look “uglier” but safer.
Runs before / alongside Disallowed file names substitutions.
Common problems
Members complain names changed
Explain this switch. Turn it off only if you accept riskier filenames.
Wrong admin hint text
Trust the behavior above (non-alphanumeric → _). If the row hint looks inverted in your build, the tooltip/behavior still matches this article.