Hi!
How can I remove data after end of school year(s)? How to empty the moodledata folder (regularly)?
(We have backup of database + files)
+1 to Howard's advice ... with addition that when you run reset, turn down each option for what to reset and see options. Missing resetting student submissions to assignments could result in some strange things.
Also, advise doing just one course that has a large number of participants in it to see if recyclebin is involved. Set recyclebin to show in course admin menu all the time ... instead of it's default which is to hide unless there is something in recyclebin. Also consider setting recyclebin for the shortest time to retain whatever as that would get things into trashdir a lot faster and thus deleted from moodledata.
Cron job running smoothly?
'SoS', Ken