I would like such an adjustment to appear in SMF.
When any user, except the administrator, puts an attachment on the forum, this attachment should be visible only to the author and the administrator.
When the administrator puts an attachment, the forum should give the administrator a choice: the attachment is visible to everyone, the attachment is visible only to the author of the topic and the administrator.
What is it for? Users sometimes attach files with personal information: in the file properties there is personal information (full name), in the text of the file there may be personal data: full name, addresses.
Now I just manually delete files, but often several views have already been done.
Paid or free?
Also, it would help if you mentioned what version of Smf do you need this for.
The mod is needed for SMF 2.1.
A free mod is needed or for a nominal fee (not a subscription, but to pay once).