Interesting, but honestly that's still a toy example. I'm talking about a website with > 1GB of content, and 25 top-level folders (and who knows how many subfolders), and our site still isn't what many would consider to be large.
Our site will have many hundreds of files, maybe > 1000. I can't browse it a folder at a time, making notes about file sizes on paper. I need something that shows me collected disk use by folders (recursive), and allows me to sort filenames (irrespective of folders) by age and/or timestamp.
I can access the website via FTP, so some sort of FTP crawler that gathers statistics about file sizes and timestamps might be an acceptable compromise, if I could find such a thing (anybody?). Figuring out where the references are to a given file would be important as well, but my feeling is that may be challenging with DNN?
If we expect DNN to be used in production environments, we need to think big in terms of production/enterprise quality management tools to allow people to manage their sites. Managing disk use is critically important. Something like the DNN File Manager, that shows at most 50 files at a time, one folder at a time, isn't adequate for this kind of task.