If you can't delete enough old files to free up space for new data, you can request a temporary increase in storage quota through to the end of the current semester in the Account Center [1]. Requests for up to 50 MB over your default quota will be automatically granted and processed immediately; requests for larger amounts of space are evaluated individually. You will be notified by email when a decision is made.
To request an increase in storage quota, log into the Account Center [2], click on "Account Tools," select "Network Folders Quota and Usage", and complete the application form.
Links:
[1] http://accountcenter.humboldt.edu
[2] http://accountcenter.humboldt.edu/