Blocked file extensions
Always refuse these extensions on upload and public download. Block wins over allow on overlap.
Blocked file extensions
Blocklist. Always refuses these extensions on upload and public download when the list is non-empty.
Where to find it
Admin → Settings → Files → Uploads → Blocked file extensions
Setting key: ext_not_allowed
How it works
Typical blocks: exe, bat, cmd (your risk tolerance). Works even when Allowed file extensions is empty.
If both lists are set, a type must pass the allow list and not appear here — overlap → blocked.
When a blocklist is active, uploads without an extension are rejected too.
Common problems
Software hosts blocked
You blocked exe / dmg / apk. Remove those if that is your niche.