In fact that entire list of apps is empty – would I expect to see some there? I’ve visited the settings area the OneDrive notification suggestions and it doesn’t list the “photos” app as something I can prevent from doing these auto downloads. It’s easy to get back the space by right-clicking and telling OneDrive to “clear space” in Explorer.
This morning I have 8MB (M!!) of space available again. Over the past week I’ve had it download well over 160GB 4 days out of 5. The problem is that it’ll just do it again later anyway when I’m not at the PC. I get a chance to cancel it, which takes a while but does seem to cancel. In the past couple of weeks I get these notifications from OneDrive saying its doing a download of files in the background because the photos app has requested it. I’ve got probably over 200GB or so of photos + videos in OneDrive from my mobile phone camera roll over the years.