Quota of Course Content

I am very sorry that I don't know we have a quota in Course Content. I had created a folder of Fanny in Course content and there are a lot of sub-folders and files. Now, I want to delete one of a large sub-folder "Image Editing 3 April 2008" which is in Fanny folder. Unfortunately, I cannot throw it into recycle bin without permission. Do you know how to get permission? If I do not delete it, other classmates cannot upload their files to Course Content since the quota is nearly full.

Sorry for any inconvenience.