If you receive HRESULT: 0x80040E14 when trying to add an item like announcements/webpart/saving documents before running going through the Microsoft steps you have need to check the following
Your SQL server data drive is not full
Your mdf and ldf database files havent reached there full allocated size
Your database files are set to increase when full.
If you are still having this issue after checking the above follow the step listed in this link