Hello, thanks for replaying.
I haven´t tried a course reset because there are ongoing courses all the time. If I reset a course would it not also delete all course participants? I need to delete all uploaded assignments but still have left all participants so they can continue with their courses. Before moodle was updated a couple of years back you just could go to a folder on the webbserver and delete every upload because everything was at the same place. Now I can´t find in which folder the uploads are stored.