To resolve this issue please follow the below listed steps:
  1. Open the Blackbaud Hosting Services Files Folder.
  2. Either move files to your local computer or delete files directly from the Files Folder to clear space.
If this issue persists after completing the above steps, please perform the following:
 
Please document and be prepared to share the below listed information and Click Chat with Support and reference this article. 
  • The exact steps to duplicate the issue (click by click).
  • The username of the affected Blackbaud Hosting Services account.