I'm facing the same issue. installed this plugin as well.. rapidly decreasing my server storage due to this matter. Around 4Gb per time. this happens once I take course backups manually. On my LMS there are about 50 courses. its like around 2GB total when the backup complete. after taking my backups manually I delete all files then and there. but seems its not deleting permanently. any suggestion for that? I'm using moodle 3.7. I'm hoping to check the files from backend. please tell me where to look. the location of the backup files..
Thanks
Thanks