Support ticket is in and I'm researching some temporary solutions; we'll likely up our storage for the forum temporarily as the short term fix.
The latest version of the forum software is a MAJOR update; with it it includes an image optimization tool that can go through the ENTIRE forum and resize and optimize any existing images.
There's also a new built-in tool that allows the resizing to happen automatically on YOUR side (the user side) as you upload to the forum; meaning we should be able to get a much better handle on the images being uploaded (less caps, less restrictions, but it's going to automatically resize to what we choose.)
As a temporary solution; I'm going through the attachment manger for the forum and searching for excessively large picture and video files from 2022 going backwards.