I have 1 course with a lot of video files and the MBZ file was over 50GB, we had to disable the automated backups as it was taking too long to backup and effecting performance.
I have just queried the database for the largest files and the 50GB MBZ is by far the largest, if I go to the course the file isn't listed in the Course backup area, the contextid matches the query and if I go to the moodledata folder I can find the file as it matches the contenthash.
Any ideas why the file wouldn't be displayed in the course backup area?
Could it be that the backups weren't completing as they were so big?
We did have to enable the new backup format under Experimental settings to remove the 4GB backup limit, is there a size limit for the new backup format?