Plugin offers very fine control over the attachments upload with global settings and settings that can be set for each individual forum. Plenty of options for attachments upload, display and styling, error logging and more.
Plugin settings start with global options for file count and size. Plugin can log errors that occurred during upload based on different criteria: file size exceeded, file type not allowed and other upload problems. You can control what happens to attachments when topic or reply is deleted, and also who can delete (or detach attachment) from topic or reply.
Integration for display of attachments allow a lot of control and options to display file type icons, thumbnails for images (with additional REL/CLASS attributes and aligning. You can set up the size for the thumbnails generated for uploaded images. For each topic in the forum, you can show the small icon marking that topic/reply have attachments.
Image on the right shows the example of uploaded files containing two images with thumbnails, and two files with file type icons. Each file contains options to delete file or to detach the file (leaves the file in the library, but is no longer associated with topic/reply). These options are seen only by administrators, moderators and author (depending on the settings).
To manage uploaded attachments and to see all upload errors, there are two panels added. Here is the attachments panel:
List of all Attachments